Ai heifer on natural heat question

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On TAI its because they cycle quicker.THe thinner smaller animals respond quicker to the lute in a timed situation. Not sure its right but mine are still am/pm even if there heifers on natural heat.
 
Hook":xychzwu3 said:
On observed heat with a heifer , is the am/pm rule still applicable? I ask because the ftai is far different in heifers than on cows.
Thanks
AM/PM works for all of them on observed heats.
 

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