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Impact of heat stress in local dairy herds

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by

Alex Souza

on 27 March 2015

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Transcript of Impact of heat stress in local dairy herds

% milk protein record low in summer!
Still suffer the effects of heat stress
Watch time standing and feet problems
What about milk production & components?
Health parameters when summer hits
Heifers doing any better?
Poor cooling:
Poor cooling:
$1.25
Friday, April 4, 2014
UCCE, No. 407-B
DHIA: Summer, urgent matter
Sharp drop in fertility during summer
Is cooling really worth it!
Return to investment
Souza & Silva - in progress
Summer ahead
get ready!

- Drop in SR and CR
- Loss in milk production
- Drop in milk components
- Greater SCC
- Metabolic problems, feet problems...death
- Under performing calves and heifers...
Impact of heat stress in local dairy herds
Alex Souza, DVM PhD
Dairy Advisor
UC Cooperative Extension
souza@ucdavis.edu
Impact of heat stress in local dairy herds
DC305 records: fried eggs!
CA-herds with CR below 20% in summer
Herd poor cooling
Good
cooling:
heifers?
Full transcript