We adopted a Wheaton Terrier Mix Puppy. He’s about eight months old. We take him on walks a few times a day and last night we left him in the backyard for a couple hours.

Even though he has a flea collar, I have heard that sometimes fleas will run to the back of the dog away from the poison.

Today he keeps biting at his butt and near his hind legs. When he bites at it, it sounds like it hurts because he’s really going at it.

He’s got a flea appointment at the Petsmart groomer in a couple hours.

Should we crate him until then to prevent us from getting fleas?