Remco was Germany’s #2 genomic bull in April at +162 RZG. By August, he’s #24 at +157 — and six new bulls just took his spot in the Schwarzbunt genomic top 10.
Executive Summary: The August 2026 German RZG index run reveals a significant shift in elite cattle rankings, particularly within the Schwarzbunt (Black-and-White) and Rotbunt (Red Holstein) breeds. In the genomic category, the Schwarzbunt list experienced a major overhaul as six new young bulls displaced several former leaders like Remco, while the Rotbunt rankings remained comparatively stable. The daughter-proven sector saw Zivet seize the top spot in the Schwarzbunt rankings following a notable performance gain, contrasting with former leader Picard’s sharp decline. These updates serve as a critical warning for dairy producers to revise their breeding strategies, as relying on outdated April data could lead to mating decisions based on obsolete genetic values. Ultimately, the report highlights the trade-offs between high-production traits and functional durability, while identifying specific bulls that offer reliable daughter data or unique outcross genetics.
Germany’s 11 August 2026 RZG proof run (vit/BRS) puts Skype Red (833760) atop the German Red Holstein (Rotbunt) genomic list at +163 RZG, dead level with his own April value but now ahead of Harmonic P (990001, +163 April → +161 August), who had briefly held #1. On the Schwarzbunt (Black-and-White) side, Connect (833764) stays genomic #1 but slides from +167 (8 April 2026) to +166 — while six of his ten genomic top-10 stablemates are 2025-born bulls that weren’t on the April list at all, most notably new #2 Harmony (798330, +163) and new #3 Rovis (823384, +162).
On the daughter-proven side, the bigger story is Zivet (833496), who jumps from +144 (April, rank #2) to +148 (August, rank #1) in Schwarzbunt — the largest single-bull RZG gain among the bulls tracked in this report — while former #1 Picard (811681) falls from #1 (+148, 8 Apr) to #3 (+142, 11 Aug), a −6 drop that hands the crown to Zivet. In Rotbunt, April’s co-leaders Globus (917679, +144→+143) and Globed P (924776, +144→+138) both slide as three brand-new proven entrants — Spooky Red (917693), Master P (917692) and Mat Red P (833536) — crack the top 10 on their first appearance in the daughter-proven population, a reminder that Rotbunt and Schwarzbunt run on the same RZG scale but fill their top tens very differently run to run.
What Should You Do With This Before Your Next Breeding Decision?
If you’re working from an April printout, check it now: Remco (HB-NR 811733) and Realpower (HB-NR 833731) were both Schwarzbunt genomic top-5 bulls in April and have since fallen to #24 and #13. If either is still sitting in a mating plan or semen order, that plan is running on numbers that are four months stale — see the full 30-day action item at the close of this report.
Rotbunt’s Genomic Top 10: Nine Anchors Hold, One New Face Arrives
German Red Holstein, genomics only, active AI bulls (vit/BRS)
| Rank (Aug) | Bull | RZG Aug 2026 | RZG Apr 2026 | Change | Rank Apr | Reliability (SI) | Stud |
| 1 | Skype Red (833760) | +163 (11 Aug) | +163 (8 Apr) | 0 | 2 | 77% | SYNETICS |
| 2 | Duett PP (585339) | +162 (11 Aug) | new in top 10 | — | not in Apr top 100 | 77% | RSH/PHX |
| 3 | Harmonic P (990001) | +161 (11 Aug) | +163 (8 Apr) | −2 | 1 | 77% | Phönix |
| 4 | Sancho Red (823380) | +157 (11 Aug) | +158 (8 Apr) | −1 | 5 | 77% | Phönix |
| 5 | Create P (917727) | +157 (11 Aug) | +158 (8 Apr) | −1 | 6 | 77% | Phönix |
| 6 | Maestro (917730) | +156 (11 Aug) | +157 (8 Apr) | −1 | 7 | 77% | Phönix |
| 7 | Coco Red P (833739) | +156 (11 Aug) | +157 (8 Apr) | −1 | 8 | 77% | SYNETICS |
| 8 | Semper P (917733) | +156 (11 Aug) | +159 (8 Apr) | −3 | 4 | 77% | Phönix |
| 9 | Heek Red (823375) | +155 (11 Aug) | +156 (8 Apr) | −1 | 10 | 77% | Phönix |
| 10 | Bueno Red (823382) | +155 (11 Aug) | +160 (8 Apr) | −5 | 3 | 78% | Phönix |
- Skype Red holds #1 on an unchanged +163, but only because Harmonic P (April’s leader) dropped 2 points to +161 — the swap at the top happened without Skype Red doing anything.
- Nine of ten anchors carried over from April; only Duett PP is new, and he isn’t in April’s top 100 at all, so this is a fresh genomic entry rather than a climber.
- The band compressed: April’s top 10 ran +156 to +163 (a 7-point spread); August runs +155 to +163 (an 8-point spread), but with Cardiff P (917723, April #9 at +157) squeezed out to #12 at +154 in August — the whole list simply moved down a notch or two.
Movers. No incumbent gained ground this run — Duett PP’s arrival is the only true riser, debuting at #2 with +162 on the strength of a 143 RZM (milk) sub-index, the highest of the group. Skype Red is functionally flat (0 change) but pairs a 140 RZN (fitness) with 137 RZGes, the most balanced profile in the top 3.
Fallers. Bueno Red fell hardest inside the top 10, −5 points from +160 (8 Apr, rank #3) to +155 (11 Aug, rank #10). Semper P dropped −3 (+159→+156), and Harmonic P gave up his April #1 spot, −2 to +161. Cardiff P (917723) dropped out of the top 10 entirely, from +157 (8 Apr, rank #9) to +154 (11 Aug, rank #12) — still a top-15 sire, but no longer top-10.
What this index is rewarding. Duett PP and Harmonic P both push RZM into the 143–146 range (extreme milk production) at the cost of RZN in the 131–134 band; Skype Red trades a few RZM points (131) for the highest RZN (140) and RZGes (137) in the group — pick your trade-off between raw production and functional durability. Sancho Red (RZM149) sits closer to the milk-first camp, while Create P (RZM133, RZE117) leans toward the balanced middle.
Stud and family concentration.
- Phönix places 7 of the current top 10 (Harmonic P, Sancho Red, Create P, Maestro, Semper P, Heek Red, Bueno Red); SYNETICS holds 2 (Skype Red, Coco Red P); Duett PP sits at RSH/PHX.
- Handout P sires two of the ten (Harmonic P, Heek Red) and Shield sires two more (Sancho Red, Maestro) — real sire-line stacking at the top.
- For breeders wanting to diversify away from Handout P and Shield, Duett PP (sire: Dressman P) and Bueno Red (sire: Borax Red) are the cleanest outcross options still inside the top 10.
Volatility and reliability. Every genomic-only bull in this top 10 sits at the same 77–78% SI — that’s the expected band for genomic-only proofs with no daughter data, so reliability isn’t a differentiator within this list; it will be once daughters accumulate. The real reliability split shows up on the proven list below.
Rotbunt’s Proven Top 10: Three Rookies Crack the List as Globus and Globed P Slide
German Red Holstein, daughter-proven, active AI bulls (vit/BRS)
| Rank (Aug) | Bull | RZG Aug 2026 | RZG Apr 2026 | Change | Rank Apr | Reliability (SI) | Stud |
| 1 | Spooky Red (917693) | +143 (11 Aug) | new in top 10 | — | not in Apr top 100 | 87% | Phönix |
| 2 | Globus (917679) | +143 (11 Aug) | +144 (8 Apr) | −1 | 1 | 89% | Phönix |
| 3 | Mask Red (823286) | +140 (11 Aug) | +141 (8 Apr) | −1 | 4 | 93% | Phönix |
| 4 | Sea P (917682) | +139 (11 Aug) | +136 (8 Apr) | +3 | 11 | 89% | Phönix |
| 5 | Master P (917692) | +139 (11 Aug) | new in top 10 | — | not in Apr top 100 | 87% | Phönix |
| 6 | Ginger (924764) | +138 (11 Aug) | +139 (8 Apr) | −1 | 5 | 97% | Qnetics |
| 7 | Momo Red P (833519) | +138 (11 Aug) | +136 (8 Apr) | +2 | 10 | 92% | SYNETICS |
| 8 | Spotlight (917680) | +138 (11 Aug) | +139 (8 Apr) | −1 | 6 | 92% | Phönix |
| 9 | Globed P (924776) | +138 (11 Aug) | +144 (8 Apr) | −6 | 2 | 90% | PHX/QNE |
| 10 | Mat Red P (833536) | +137 (11 Aug) | new in top 10 | — | not in Apr top 100 | 85% | SYNETICS |
- Three of ten bulls — Spooky Red, Master P, Mat Red P — are new to the daughter-proven top 100 altogether, which reads as bulls that just crossed from genomic-only into proven status with enough daughters to qualify, and landed straight in the top 10.
- April’s co-leaders (Globus +144, Globed P +144) both slipped: Globus to #2 (+143), Globed P all the way to #9 (+138, a 6-point drop).
- The top-10 band narrowed from +136–+144 (April) to +137–+143 (August) — less spread, fewer standout anchors.
Movers. Sea P climbed from #11 (+136, 8 Apr) to #4 (+139, 11 Aug), a +3 gain and seven-place jump. Momo Red P moved from #10 (+136) to #7 (+138), +2. The headline “risers,” though, are the three new entrants noted above — none of them existed in the April top-100 daughter-proven ranking.
Fallers. Globed P is the biggest faller still inside the top 10, −6 from +144 (8 Apr, #2) to +138 (11 Aug, #9). Spot-Red P (267101) dropped out of the top 10, from +141 (#3, 8 Apr) to +137 (#11, 11 Aug). Glamour (499208, +136, #9 in April) dropped out of the entire top-100 list by August — not just out of the top 10, but off the active-bull proven ranking altogether.
What this index is rewarding. Spooky Red leads on RZM (140, milk) with modest RZE (110, type); Globus is the mirror image — lower RZM (120) but stronger RZE (127) and RZN (129) — so herds chasing components without sacrificing type still have an option in the top 3.
Stud and family concentration. Phönix holds 6 of 10 outright (Spooky Red, Globus, Mask Red, Sea P, Master P, Spotlight) plus a share of Globed P via PHX/QNE; SYNETICS has 2 (Momo Red P, Mat Red P); Qnetics has 1 (Ginger).
Volatility and reliability. Ginger (97% SI, 1,204 daughters) and Mask Red (93% SI, 1,233 daughters) are the anchors here — long track records, minimal re-rank risk. The three new entrants are the volatility plays: Mat Red P at 85% SI and Master P at 87% SI carry the least daughter weight of the group and are the most likely to move again next run.
RZG’s Genomic Top 10: Six New Bulls Just Rewrote the List
German Holstein, genomics only, active AI bulls (vit/BRS)
| Rank (Aug) | Bull | RZG Aug 2026 | RZG Apr 2026 | Change | Rank Apr | Reliability (SI) | Stud |
| 1 | Connect (833764) | +166 (11 Aug) | +167 (8 Apr) | −1 | 1 | 77% | SYNETICS |
| 2 | Harmony (798330) | +163 (11 Aug) | new in top 10 | — | not in Apr top 100 | 77% | Marktred |
| 3 | Rovis (823384) | +162 (11 Aug) | new in top 10 | — | not in Apr top 100 | 77% | Phönix |
| 4 | Artistic (694753) | +160 (11 Aug) | new in top 10 | — | not in Apr top 100 | 77% | Phönix |
| 5 | Agent (762699) | +160 (11 Aug) | new in top 10 | — | not in Apr top 100 | 77% | Phönix |
| 6 | Almonty (833785) | +160 (11 Aug) | new in top 10 | — | not in Apr top 100 | 77% | SYNETICS |
| 7 | Saturn RDC (103000) | +160 (11 Aug) | +161 (8 Apr) | −1 | 10 | 77% | VOST |
| 8 | Smetana (833782) | +159 (11 Aug) | new in top 10 | — | not in Apr top 100 | 77% | SYNETICS |
| 9 | TooHot (823381) | +159 (11 Aug) | +161 (8 Apr) | −2 | 5 | 77% | Phönix |
| 10 | Carlito (823376) | +159 (11 Aug) | +161 (8 Apr) | −2 | 6 | 77% | Phönix |
- This is the most dramatic reshuffle in the whole run: 6 of 10 current bulls — Harmony, Rovis, Artistic, Agent, Almonty, Smetana — are 2025-born genomic bulls that do not appear anywhere in April’s top 100. Only Connect, Saturn RDC, TooHot and Carlito carried over from April’s top 10.
- Six former April top-10 bulls fell out of the top 10 (though not out of the top 100): Remco (811733, April #2 at +162) fell to #24 at +157; Realpower (833731, April #3 at +161) fell to #13 at +158; Realside (833724, April #4 at +161) fell to #19 at +157; Evenstar (694090, April #7 at +161) fell to #23 at +157; Romantiker (694092, April #8 at +161) fell to #16 at +158; Highmilk (694094, April #9 at +161) fell to #32 at +156 — all still inside the top 100, just pushed well clear of the top 10.
- The band held roughly steady in level (April +161–+167, August +159–+166) but the composition is almost entirely new.
Movers. There are no incumbent risers by value — every returning bull (Connect, Saturn RDC, TooHot, Carlito) lost ground. The four biggest movers are all new entrants: Harmony debuts at #2 (+163) on a 148 RZM / 126 RZE profile; Rovis debuts at #3 (+162, RZM144); Artistic and Agent — both sired by Argentum — debut at #4 and #5 (+160 each).
Fallers. Remco (811733) fell hardest, −5 from +162 (8 Apr, #2) to +157 (11 Aug, #24) — a complete exit from the top 10. Highmilk (694094) also dropped −5, from +161 (#9) to +156 (#32). Realside (833724, −4, #4→#19) and Evenstar (694090, −4, #7→#23) round out the biggest fallers, all still comfortably inside the top 100 but nowhere near the top 10 anymore.
What this index is rewarding. Connect leads on RZM (150) and RZN (136) simultaneously — a rare combination — while Harmony trades a couple of RZM points (148) for notably better RZE (126 vs Connect’s 118). Rovis (RZM144, RZE125, RZN134) sits between the two, and is the more balanced pick of the new-entrant wave.
Stud and family concentration.
- Phönix places 5 of 10 (Rovis, Artistic, Agent, TooHot, Carlito); SYNETICS has 3 (Connect, Almonty, Smetana); Marktred (Harmony) and VOST (Saturn RDC) hold 1 each.
- Argentum is the sire of both Artistic and Agent — the only sire-line duplication in this top 10.
- For herds wanting to avoid doubling up on Argentum, Connect (sire: Comet) and Carlito (sire: Callum) are the cleanest outcross anchors still in the top 10.
Volatility and reliability. Like the Rotbunt genomic list, every bull here sits at the same 77% SI — the standard genomic-only band. With six of ten bulls brand new to the ranking, this list carries the highest re-rank risk of the four reported here; none of it is visible in the reliability column because genomic SI doesn’t move until daughters arrive.
RZG’s Proven Top 10: Zivet Takes the Crown From Picard
German Holstein, daughter-proven, active AI bulls (vit/BRS)
| Rank (Aug) | Bull | RZG Aug 2026 | RZG Apr 2026 | Change | Rank Apr | Reliability (SI) | Stud |
| 1 | Zivet (833496) | +148 (11 Aug) | +144 (8 Apr) | +4 | 2 | 97% | SYNETICS |
| 2 | Krispy (823290) | +144 (11 Aug) | new in top 10 | — | not in Apr top 100 | 88% | Phönix |
| 3 | Picard (811681) | +142 (11 Aug) | +148 (8 Apr) | −6 | 1 | 91% | Phönix |
| 4 | Milo (267282) | +141 (11 Aug) | new in top 10 | — | not in Apr top 100 | 88% | OHG |
| 5 | Glenn (823284) | +141 (11 Aug) | +143 (8 Apr) | −2 | 4 | 91% | Phönix |
| 6 | Comeback (619239) | +141 (11 Aug) | +139 (8 Apr) | +2 | 22 | 92% | PHX/QNE |
| 7 | Skater (833504) | +140 (11 Aug) | +141 (8 Apr) | −1 | 7 | 94% | SYNETICS |
| 8 | Golf (159002) | +140 (11 Aug) | +141 (8 Apr) | −1 | 8 | 95% | VOST |
| 9 | Simba P (266588) | +140 (11 Aug) | +142 (8 Apr) | −2 | 5 | 97% | OHG |
| 10 | Mirco (266363) | +140 (11 Aug) | +141 (8 Apr) | −1 | 9 | 98% | OHG |
- Zivet’s +4-point jump (+144→+148) is the single largest RZG gain among the bulls tracked in this report, and it’s enough to take the #1 spot from Picard.
- Picard’s −6 drop (+148→+142) is the steepest fall within Schwarzbunt’s proven top 10 — he remains #3, but the April leader is no longer the clear standout. Rotbunt’s Globed P (−6, +144→+138) fell by the identical margin and also held onto a top-10 spot (#9), so the two are tied for the steepest top-10 fall of any bull in this report.
- Comeback is the quiet story: +2 in value but a 16-place rank jump (April #22 to August #6), the sharpest rank climb on either proven list.
Movers. Zivet leads (+4, #2→#1). Comeback gained +2 and jumped from #22 to #6 — proportionally the largest rank movement in this report. Krispy and Milo are new entrants, debuting at #2 (+144) and #4 (+141) respectively, neither appearing in April’s top-100 daughter-proven list.
Fallers. Picard fell hardest among bulls still in the top 10, −6 (+148→+142, #1→#3). Glenn and Simba P both dropped −2 (Glenn: +143→+141, #4→#5; Simba P: +142→+140, #5→#9). Three April top-10 bulls dropped out entirely: Glarus (267161, +143 April #3 → +139, #13 August), Precision (575319, +142 April #6 → +137, #27 August) and Adwin (833502, +141 April #10 → +139, #14 August).
What this index is rewarding. Zivet is a milk-first anchor (RZM 150) with modest type (RZE 116); Krispy balances lower RZM (136) against notably stronger RZR (127) and RZN (124) — the fitness/functional trade familiar from the Rotbunt list repeats here on the proven side.
Stud and family concentration. Phönix holds 3 outright (Krispy, Picard, Glenn) plus a share of Comeback via PHX/QNE; OHG holds 3 (Milo, Simba P, Mirco); SYNETICS has 2 (Zivet, Skater); VOST has 1 (Golf).
Volatility and reliability. Mirco (98% SI), Simba P and Zivet (both 97% SI) are the clearest anchors on this list — minimal re-rank risk. Krispy and Milo, both new entrants at 88% SI, are the volatility plays: high enough index to sit in the top 5, but with the least daughter backing of the group.
How Should You Actually Use These Rankings?
High-reliability anchors. For herds that want minimal re-rank risk on the next run, Ginger (Rotbunt proven, +138 RZG, 97% SI) and Mirco (Schwarzbunt proven, +140 RZG, 98% SI) carry the deepest daughter files of any bull named in this report.
Milk-first specialists. For herds prioritizing component yield above all else, Connect (Schwarzbunt genomic, +166 RZG, RZM150) and Zivet (Schwarzbunt proven, +148 RZG, RZM150) are the clearest production-first picks on their respective lists.
Balanced/type-leaning options. For herds that need type and functional traits alongside production, Globus (Rotbunt proven, +143 RZG, RZE127/RZN129) and Krispy (Schwarzbunt proven, +144 RZG, RZR127/RZN124) trade a few RZM points for a more even trait spread.
Outcross candidates. For breeders managing inbreeding risk against the Handout P/Shield (Rotbunt) and Argentum (Schwarzbunt) sire-line concentrations documented above, Bueno Red (sire: Borax Red) and Carlito (sire: Callum) sit outside those lines while still ranking in their respective genomic top 10s.
Volatility plays. For herds comfortable with re-rank risk in exchange for index level, the newest entrants — Duett PP and Harmony among the genomic bulls, Krispy and Milo among the proven bulls — carry the least track record of anyone named here and are the most likely names to move meaningfully at the next run.
30-day action. Within 30 days, pull your current Rotbunt and Schwarzbunt sire lists and check them against HB-NR 811733 (Remco) and HB-NR 833731 (Realpower) — both April Schwarzbunt genomic top-5 bulls that fell to #24 and #13 respectively; if either is still queued in a mating plan built on April data, the plan is running on numbers that are no longer current.
- GERMANY – R&W – Interbull Genomics – 08/26
- GERMANY – R&W – Interbull Dtr Proven – 08/26
- GERMANY – R&W – Domestic 99% R Bulls – 08/26
- GERMANY – R&W – Domestic Genomics – 08/26
- GERMANY – R&W – Dtr Proven – 08/26
- GERMANY – B&W – Interbull Genomics – 08/26
- GERMANY – B&W – Interbull Dtr Proven – 08/26
- GERMANY – B&W – Domestic 99% R Bulls – 08/26
- GERMANY – B&W – Domestic Genomics – 08/26
- GERMANY – B&W – Dtr Proven – 08/26
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