Morkie marking in house
We have a boy morkie that is almost 2. He's lived with us since he was about 2 months old. He marks all over the house. He's let out every time he wants outside (we have bells, he uses an outside button and sometimes he simply whines at the door) and will occasionally mark not long after he comes back in. We've taken him to the vet and there isn't an infection. It is clearly marking behavior because he will do it in the same places almost every time, but occasionally when something new get brought home, like a case of soda for example, he will go mark that. I've tried cleaning the spots with bleach, but that seems to make him mark it more quickly. We reward him for going outside. We try to catch him in the act, but we rarely do. when we do catch him, we have tried making a loud noise and telling him no. He gets lots of exercise, play time with his doggy sister's and his humans, things to chew on, he has a puzzle toy... honestly I feel like I've read or tried just about everything. He even marks every thing outside, including all the things on our back porch, one of his dog sisters and he's even marked me a few times when we first got him. please, any advice would be helpful. I did look at all the links but I didn't find one for marking troubleshooting.