Did a clean out on stud two weeks ago. Eval came back great. Today collection done and libidio was very low. Volume was small, count was a little low and there were bent tails present. Vet didn't seem to be concerned as this hasn't been issue in past. Suggested we try again in week or so. Am I being worry wart? Any one with bent tail experience s

Bent tails are from the collection technique. Check him again in a couple of weeks and make sure to have a teaser bitch in heat for him. Should improve your collection results.

Bent tails have to do with collection method? Did I read that?

That makes no sense at all. The sperm you collect today was made 2 to 3 months before.

The stud dog needs to be checked for infection. How old is the boy? Sperm abnormalities can affect his fertility.

Do not ignore this. Act quickly.

He is four.Any environmental factors that can contribute to bent t
ails?

He could have an infection. I would take him to a repro vet to be collected and analyzed pronto!