Hello,
I have an 8month old dog who continues to poop in his crate. He pooped in my room and then I put him in the crate this morning and he pooped again. He does this once a month. He regresses to popping in the crate. What can this be? He does for 3 days and stops...

I have moved your post from the Medical Science board (which is more for us humans) to the Dogs board where it will get the attention it deserves.

I would try giving him some exercise before putting him in the crate. Walk him around a little outside. It may stimulate him into having a bowel movement and then be OK in the crate.

If you are not feeding a concentrated, meat based chow, switching to one will produce smaller stools perhaps allowing him to last until you let him out.