Hello. I have a 10 year old happy and energetic Bichon Frise. Just recently he started to urinate all over the house. He sprinkles on table legs, chairs, wicker baskets, and even in the room I share with him on the bed leg. He mostly does it when nobody is watching, but sometimes he will do it right in front of us! He never did this before and its not like him, he knows better. Sometimes we will take him out and he comes right in the house and sprinkles. He otherwise eats and drinks a lot.We have taken him to the vet and spent at least 900 dollars on blood tests, everything from thyroid, to cancer, to diabetes, and everything came back normal. He was checked for kidney stones but for some reason the vet could not see the x-rays properly. He is still very sharp and doesn't have anything wrong with him mind yet. We do have another male dog but they are both neutered and get along well. A 4 year old Husky. I don't believe its age or behavioural, but I'm not sure. I want to help him but don't know how. Does anyone know what could be wrong with him. I love my dog but this truly has me puzzled?

We do have another male dog but they are both neutered and get along well.
Is this a new dog?

Is your other dog a new addition? Any other changes in your home, a move, job change, a child, a cat, a new pet, new furniture, etc?

Often times, if it's not medical, a dog will start urinating in the home to mark his territory, because there's been a huge change in the home.

Can you think of any huge changes in your home?