Iowa Pork Congress 2004 Gilt Development & Lactation Length Influence on Born Alive Larry Himmelberg, M.S. January 28, 2004

Gilt Development  Maximizing Born Alive For P1 and Beyond  Key Management Protocols  Actual Producer Results

Gilt Development  Key Management Protocols to Maximize BA  Background  Split Regarding P1 Born Alive  10 to 10.5 vs  Ask Questions of Customers  Size & Age Key Differences

Gilt Development  Key Management Protocols to Maximize BA  Size/Age at First Mating  Prior Targets 265 & 6-7 Month of Age  Goal For 1 st Mating=>ASAP  Small Frame Issues  Mated off the Truck  Stunted Growth-High Replacement  Longevity  P1 Weight Loss

Gilt Development  Which is Key Age &/or Size  Both  Age  250+ Days  Weight => Frame Size  320+ Pounds  Caution: Not All Genetic Lines!

Gilt Development  Key Management Protocols  Get Back to Basics  2 nd or 3 rd Estrus  Time Boar Exposure, Issue?  Flush  Be Mindful When Moving From Isolation

Gilt Development  Key Management Protocols  Mating On Second Estrus+  Boar Exposure  Physical Contact 8 to 20 Minutes/Day  Direct vs Fenceline  Record Gilts Expressing Estrus  Timing => ~ Days Prior to Mating  Age Related?  Staleness

Gilt Development  Actual Results  Be Results Oriented  Your Operation  Benchmarking

Prod 1: Farrowing, 12 Months Prior to Gilt Development Strategy Implementation. Note BA is Below Benchmark Target

Prod 1: Farrowing, 6 Months After Gilt Development Strategy Implementation

Prod 2: 12 Months Prior to Gilt Development, Note P1 & P2 Below Benchmark

Prod 2: 12 Months After Gilt Development Strategy, P2 Problem 2002 Recs (Prev) Age 220+ (200) Size 290+ (265) 2 nd Estrus + (~50%, E1) October ’03: >BA 1.Days > 2.Weight > 3.Flush 4.***Feed Intake

Prod 2: Last 9 Months After Gilt Development Strategy Implementation, Note P2 & Some P3 Increase 1.P2 Reflecting, Gilt Development, Still Too Low 2.>P2 Similar 3.Herd BA Up.3 4.Herd BA < BM

Prod 2: Last 3 Months, Note P2 & Some P3 Increase 1.P2 Reaching Target 2.Herd BA Up.3 3.Herd BA < BM, Later P

Prod 3: Excellent 11.4, But Parity 1 Opportunity 2002 Recs (Prev) Age 220+ (200) Size 290+ (265) 2 nd Estrus+

P1 Increase.5 Pig, PRRS Flare Up During This Time, All P Equal 11.7 Feb 11, 03, Flush 1.P1 Goal, P All P => BM 4.WSC 27+

No Way to Max Born Alive w/o P1 &/or P2 Genetic Potential, 38% of Farrowings

Customers: Look For Relationship & Benchmark Numbers

Gilt Development Economics

Gilt Development Economics ( Per Month) Assumptions 1.$36/7.5ft * 12ft = $57.60/12 = $4.80/Month 2.Feed $9/Month 3.Misc $.50 4.Total $12.50/Month, Add to Gilt Cost

Previous Lactation Influence on Subsequent Born Alive

Top 10: 28.6 WA, P/S/Y

5 Producer Average 1 Day = ~.10 Pig BA, Matches Danish Numbers

Can We Influence w/ Gilt Development? Feed Intake ~ 4 Pounds Lower Can Smaller Gilts Handle Longer Lactation Periods

Previous Lactation Length Economics  Assumptions  Avg 1 Day of Lact Length =.1 BA  Number of Sows Equal

Previous Lactation Length Economics  Farrowing Phase  Adding Crates, Reduces/Eliminates Economic Incentive?  Value in Subsequent Performance?  Adg, Death Loss, % Lean  How do you Calculate?  Fit the Model At Least $1.25/Pig in Research Model

Main, KSU Swine Day 2002

Questions/Comments Thanks