Quick question, I could not get a cidr for lack of better terms installed in a heifer today????? I never have had this problem before. I had a group of 3 replacement heifers and the other 2 no problem. all the same age. She was extremely worked up going in the chute, maybe that was it , maybe too immature? But after a few times I figured it was a no go at this time. Anyone ever had this trouble? what do you think??