Luca is almost 5 months old and up until this week I would say that he is 99% house trained but all of the sudden he is peeing in the house like he is a 10 week old puppy again. Twice today he went outside and peed only to pee again 10 minutes later in the house. Last night he did it aswell. Why is he not completely emptying his bladder outside? Is he marking? Could he be have some sort of urinary tract infection? He has had bed diahrrea and has been drinking a lot of water but he usually rings the hanging bells when he wants to go out and pee. Why is he okay with peeking in the house again?