Hello. Ive recently purchased a miniature dachsund and he is about 4 months old now. Ive been having a problem with him pooping in his kennel when I leave him in the kennel. I only put him in the kennel when Im not home. I was told he was doing it because the kennel was too big so I bought a small pet taxi. It is just big enough for him to stand up and turn around in. Although he is still pooping in it and it's a mess! I do not know what to do next. Please helppp!