ANIMAL SCIENCE 435 APPLIED DAIRY FARM EVALUATION Leo Timms Iowa State U. ltimms@iastate.edu Spring...

ANIMAL SCIENCE 435 APPLIED DAIRY FARM

EVALUATION

Leo TimmsIowa State U.

ltimms@iastate.edu

Spring Semester, 2015

1:10 – 2:00 M-W 1805 Gilman

8:00 – 9:50 am Fri. 104 /124 Kildee

Instructors:• Dr. “Leo” Timms, 123 Kildee Hall, 294-4522, 515-291-

7371(cell), 232-5058 (home) , ltimms@iastate.edu

• Dr. Pat Gorden, Vet Med, 515-414-6133, pgorden@iastate.edu

• Mike Bahl, 563-599-2352, mikebahl@iastate.edu

• German Carujo, 515-520-3523, gcorujo@iastate

• Many others along the way!

Course materials:Under AS 435 class in computer lab• http://www.anslab.iastate.edu/Class/AnS435/

ARE YOU PREPARED?

Herd VisitPC DART on computer Your herd on PC DART

Herd Detective Dairy Comp 305 (no one yet)

DHIA INDIVIDUAL COW, HERD SUMMARY, AND QUILTING WORKSHOP

Leo TimmsIowa State U.

HOWDY, I’M LEO

I’m a dairy guy!

RECORDS Data is: **Accurate!!! **Timely

**Precise measurements** Human data entry (raw/ calculated)

Snapshots / photographs

• Who is (not) in the picture?• What time frame? Today? Yesterday?

• Does picture represent what I’m looking for?

Interpretation depends on yesterday!!

MONITORING

IS A

MUST!!!!

9

Records Evaluation

• When evaluating records, always consider how the data may be influenced by statistical errors:– Averages – (small numbers, wide range)– Bias– Momentum– Lag– Variation

10

Data Evaluation

• Momentum – Influence that previous measurements have on a parameter.

• Lag – The time it takes for a parameter to show a change in response to a problem or management change

– Ex. – Rolling Herd Av

-Calving Interval

11

Data Evaluation

• Variation – For all calculations there is an underlying distribution of individual performance.

• It is possible that the status of problem animals can be hidden behind an acceptable average.

• Sometimes it is important to look at the individual data that lies behind a summary parameter.

BENCHMARKING What is a benchmark???

REFERENCE POINT!!!• Where I’m at!

• Where I want to go!• Where others are at!

• Maximum / minimum! Optimum!• Realistic!!!!!!!!!!

BENCHMARKING SCC/ REPRO / HEALTH

HERD OR INDIVIDUAL COW?

Lowest SCC vs maximal healthy udders

Highest Preg vs Get all cows Rate pregnant in timely manner

Individual cows

????

DHI – 202!!!!!!!

TWO MINUTE DRILL!!!

Milk production

Milk production

EXPENSESINCOME

LaborLabor

Feedand nutrition

Quantity!Quality!

utilities

1/14/2015

ASSIGNMENT 1 ANSWER MATRIX

ASSIGNMENT 1 ANSWER MATRIX

ASSIGNMENT 1 ANSWER MATRIX

BREED!HERD TYPE?

HERD GOALS?

ASSIGNMENT 1 ANSWER MATRIXTOPIC PARAMETER # BEST ONE??? GOALS

MILK RHA – MILK +MILK/COW

150 DAY MILK

881

MILK /COW2X: 80-85# 3X: 90+ #

SCC AVERAGE SCCAVERAGE LINEAR SCORE% COWS >200,000 OR

1.1M$ LOSS

62

3 31

AVERAGE SCC / LINEAR<200,000 OR < 4.0

REPRO PREG RATE S/C or P% heats Conc Rate

Calving Int. Days openHeat Int. Bred BNP

5 31 31 21 2

PREGNANCY RATE> 20% (22-25%)

CULLING CULL RATECOWS ENTER / LEAVE

HERD% INVOLUNTARY CULL

COWS DEAD

4331

% culled:< 30%; invol. < 15%

Reasons and whenWOW????????

REPLACE.

% STILLBORNOFFSPRING BORN ***

HEIFERS TO CALVE

181

MILK COMP Milk FatFat and Protein

11

RHA # ; %

GENETICS Average merit $ AI

1

FEED / $ # feed consumedFeed cost /cwt

milk

11

INCOME OVER FEED COSTS

????????????

ASSIGNMENT 2 Go to website: drms.org Peruse the site (you will use)Login: UN: S042E003 (all zeroes)

PW: ISUE1207 Go to web reports Type in your herd code (class site) Get copy of herd 202 and save

3

WHAT IS THE AVERAGE WEIGHT IN THIS ROOM?

WHAT DOES IT MEAN AND WHO CARES?