Puppy pooping in crate at night
I have a 3 month old Yorkie, Chihuahua mix that we have had for about a month now. The first few weeks went the same as house breaking any new puppy, with him having accidents in the house, but over time started happening less often. But then we went out of town for a week and left him at a Kennel that my cousin works at. When we returned home and got him and his crate back, I noticed dried poop at the bottom of his crate... something he had never done before. Ever since then he has been pooping in his crate every night! It is very frustrating to give him and his crate a bath every day! I have also heard that the size of the crate can be a problem when this is happening but I did research and his crate is about the right size. He is also walked very regularly, all through out the day and then at 11 pm and 7 or 8 am. I don't understand why this has started happening when it wasn't a problem before.
Oh and I'm not sure if this has anything to do with it... but he has also started whining a lot more when I put him in his crate. He used to just cry a little for a minute or two, but now he barks and howls for several minutes.
Thanks for your time! Please help me if you can!