0
Cheryl A. Fairbairn, PSU Animal Science Educator

SELECTING BREEDING BULLS AND
FEMALES FOR A GRASS BASED SYSTEM
Purchasing
Bulls

Breed
Age
Number of cows to service
Ultimate goal for offspring
Replacements
Terminal
Purchasing
• Females
– Breed
– Age
•
•
•
•
•

Weaned heifer calves
Yearling heifer calves
Bred heifers
Two year olds
Matur...
Past herd history
• Where did they originate?
– Environment plays an important part
– Are they able to efficiently convert...
Genetic Information
• Use of EPDs on specific breeds.
• In bulls look for sires that will provide growth
• To be profitabl...
Genetic
• When grass gets short there is not enough
energy provided to allow them to milk and
rebreed
• They get thin and ...
Genetics
•
•
•
•

Are you always around?
Are you away during the day?
Is there help readily available to pull a calf?
Lowe...
Phenotype
• Structural soundness is the key to longevity in
the herd.
• Feet and legs are so important to any
operation be...
Phenotype
• Udders must be sound on females
– Small teats so baby calves can access them easily
– Tight udders are healthy...
Records
• Are their any records on the cattle you are
purchasing?
• Mature cows
– Calving interval
– Average weaning weigh...
Records
• Heifers
– Weaning weights
– Yearling weights
– Individual Birth Weight
Records
• Bulls
– Birth Weight
– Weaning Weight
– Yearling Weight
– Attitude
– Breeding Soundness Exam
Health
• Vaccination and worming schedule
• History of where they have been and where
did they come from
• Breeding Soundn...
Replacements from your own herd
• Much easier to understand but still not a sure
thing
• Really don’t know until she gets ...
Summary
• Don’t just purchase because cattle look the
part
• Be able to evaluate soundness
• Understand records
• Understa...
Questions
Upcoming SlideShare
Loading in...5
×

Selecting bulls and replacement females

778

Published on

powerpoint presentation by Cheryl Fairbairn. Looking at the grass based system

Published in: Education, Business, Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
778
On Slideshare
0
From Embeds
0
Number of Embeds
2
Actions
Shares
0
Downloads
19
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Transcript of "Selecting bulls and replacement females"

  1. 1. Cheryl A. Fairbairn, PSU Animal Science Educator SELECTING BREEDING BULLS AND FEMALES FOR A GRASS BASED SYSTEM
  2. 2. Purchasing Bulls Breed Age Number of cows to service Ultimate goal for offspring Replacements Terminal
  3. 3. Purchasing • Females – Breed – Age • • • • • Weaned heifer calves Yearling heifer calves Bred heifers Two year olds Mature Cows
  4. 4. Past herd history • Where did they originate? – Environment plays an important part – Are they able to efficiently convert grass? – Are the acclimated to your environment? – What area of the country are they coming from? – How were they handled?
  5. 5. Genetic Information • Use of EPDs on specific breeds. • In bulls look for sires that will provide growth • To be profitable cattle must grow quickly on grass so optimal growth is a must! • Cows should be adequate in milk but not excessive • High milk cows will wean off big calves but sometimes will not rebreed.
  6. 6. Genetic • When grass gets short there is not enough energy provided to allow them to milk and rebreed • They get thin and then you have an open cow. • So moderate milk selection is better • Birth Weight EPD on bulls and females is essential too!
  7. 7. Genetics • • • • Are you always around? Are you away during the day? Is there help readily available to pull a calf? Lower BW EPD’s are the best for many parttime producers or for those who may work away from the farm. • It all starts with a live calf!
  8. 8. Phenotype • Structural soundness is the key to longevity in the herd. • Feet and legs are so important to any operation because they must be able to get around and forage. • Unsound cattle will spend their day laying down rather than foraging. • Unsound cattle are often less fertile
  9. 9. Phenotype • Udders must be sound on females – Small teats so baby calves can access them easily – Tight udders are healthy udders • If they have no suspension they are susceptible to disease and are not easy for calves to access. • If teats are large like coke bottles calves cannot get started on their own and will die if not tended to. • Do you have time to milk out a cow every time she calves?
  10. 10. Records • Are their any records on the cattle you are purchasing? • Mature cows – Calving interval – Average weaning weight – Dystocia problems – Mothering ability – Attitude
  11. 11. Records • Heifers – Weaning weights – Yearling weights – Individual Birth Weight
  12. 12. Records • Bulls – Birth Weight – Weaning Weight – Yearling Weight – Attitude – Breeding Soundness Exam
  13. 13. Health • Vaccination and worming schedule • History of where they have been and where did they come from • Breeding Soundness Exams • Any injuries • Health papers? Within state and from out of state makes a difference!
  14. 14. Replacements from your own herd • Much easier to understand but still not a sure thing • Really don’t know until she gets into production • Even the best numbers can fail miserably • Better bet though because you know the history and they are acclimated to your environment!
  15. 15. Summary • Don’t just purchase because cattle look the part • Be able to evaluate soundness • Understand records • Understand EPD’s for that breed • If possible look at cows with calves on them • The cow and calf will tell you a lot!!!
  16. 16. Questions
  1. A particular slide catching your eye?

    Clipping is a handy way to collect important slides you want to go back to later.

×