This might be of interest.
http://www.iaea.org/programmes/nafa/d3/public/ai-cattle-web/heat_detection/index.html
Be sure to click on the next botton at bottom of screen.
I have a calf 3 days old that will not nurse. I put teat in the calf mouth, squirt milk on nose and mouth. Calf acts like it don’t know what to do. It will drink some from a bottle. Are some calves just to dumb to nurse? Any suggestion?
Banded two calfs today. I picked them up and placed them in back of the truck. They were 3 and 5 days old, did not have to give much attention to the momma cows, she could not get to us. Worked great today. Is there a better way to do this?