525HO122 Mt-Glen Jonah
Forrest
aAa: 261453 | BC: A2/A2 | KC: AA
Reg: 840003136953026 | DOB: 09/25/2016
Pedigree Analysis
This Jonah son has developed into a stellar individual, scoring EX-93 as a 5 year old! Forrest is special, not only because he’s A2A2 and carries a rare aAa code, but also since his bloodlines are free of many household-name sires that tend to crop up in today’s pedigrees. You will find no Durham, Goldwyn, Shottle, Storm, Oman, or Planet; he is a true out-cross.
Forrest’s dam, an 11 year old cow, typifies what makes Mt-Glen breeding so special. She was built like a tank, with tremendous width, rib and capacity; this is combined with beautiful dairy character, and a will to make well over 30,000 lbs in a lactation. This cow, Mt-Glen Levi Fran (EX-94 3E), produced well over 200,000 lb lifetime and has records up to 6% butterfat.
The first crop of Forrest daughters are calving in and so far we like what we’re seeing. Overall balanced young cows with plenty of strength and width. This coming year we should see many more freshen in!
Forrest Daughter:
Glen-Jan Forest Flo (GP-82)
Dam of Forrest:
Mt-Glen Levi Fran (EX-94 3E)
Five Consecutive Generations! Left to Right: Mt-Glen Levi Fran EX-94 3E), Mt-Glen Acme Flo (EX-94 2E), Mt-Glen Levi Fern (VG-85), Mt-Glen Jonah Finesse, Mt-Glen Jose Finale
| Sire: | Mt-Glen Adolph Jonah (EX-93) |
|---|---|
| Dam: | Mt-Glen Levi Fran (EX-94 3E) |
| 2nd Dam: | Mt-Glen Encore Helena (EX-91 2E) |
| 3rd Dam: | Mt-Glen Leadman Hopper (EX-91 7yr) |
| 4th Dam: | Mt-Glen W C Mark Huntress (VG-85 4yr) |
| 5th Dam: | Mt-Glen Elevation Haleeka-ET (VG-85 5yr) |
| 6th Dam: | PFB-BET-AL Hilltop Ivanhoe (VG-88 12yr) |
| MILK | FAT% | FAT LBS. | PRO% | PRO LBS. | M. SPEED | NMS | TPI |
|---|---|---|---|---|---|---|---|
| -2,574 | 0.05% | -95 | 0.02% | -80 | 6.7 | -1,215 | 1,222 |
| MILK | FAT% | FAT LBS. | PRO% |
|---|---|---|---|
| -2,574 | 0.05% | -95 | 0.02% |
| PRO LBS. | M. SPEED | NMS | TPI |
|---|---|---|---|
| -80 | 6.7 | -1,215 | 1,222 |
| SCS | DPR | CCR | HCR | PL | LV |
|---|---|---|---|---|---|
| 3.63 | -2.8 | -3.1 | -2.9 | -6.4 | 0.2 |
| — | 79%R | 80%R | 60%R | 83%R | 50%R |
| SCS | DPR | CCR |
|---|---|---|
| 3.63 | -2.8 | -3.1 |
| — | 79%R | 80%R |
| HCR | PL | LV |
|---|---|---|
| -2.9 | -6.4 | 0.2 |
| 60%R | 83%R | 50%R |
| PTAT | UDC | FLC |
|---|---|---|
| -0.23 | -0.85 | -0.12 |
| SIRE CALV. EASE | DAU. CALV. EASE |
|---|---|
| 3.0 | 2.4 |
| 89%R | 76%R |
comparable PTAT bulls
305-AA is the standardized milk, fat, and protein yield estimate used by CDCB to compare cows of different ages, parities, breeds, and regions on equal footing. According to CDCB and USDA AGIL, it represents “a 305-day lactation record at 36 months of age” — hence “Average Age,” or AA.
It replaced 305-ME (Mature Equivalent) in June 2024 for published records and was implemented in the calculation of CDCB genetic evaluations effective August 13, 2024. ME had been the standard since 1935.
How it is calculated
The new factors are applied as a series of separate multipliers for age-parity, season, previous days open, and milking frequency. Lactation records are adjusted upward or downward to what the cow would have been expected to produce as a 36-month-old, milked twice daily for 305 days.
Key adjustments include:
- Age-parity: Standardized to 36 months rather than ME’s mature range of 61–86 months depending on breed.
- Season/climate: Seasonal effects are now estimated within five regions defined by the average climate zone scores for each state, replacing the old three east-to-west geographic regions.
- Milking frequency: Still standardized to 2x milking, unchanged from ME.
- Previous days open: The methodology for this adjustment is also unchanged from ME.
Sources: CDCB/USDA AGIL, “August 2024 Evaluations: What’s New?” (July 11, 2024); CDCB, “Introducing 305-AA: The New Standardized Yield Measurement” (June 21, 2024).