I have a 3 year old Yorkie who is the love of my life. The problem - he is still going in the house when we are not home. When we are home, he scratches at the door and we let him out. I have started crating him again, but he goes in the create. He is on a special dog food for allergies. His stool is always runny (which is not pleasant to clean up). Any tips or ideas would be greatly appreciated. My husband is at wits end.