Greetings! I've searched from one end of the internet to the next trying to solve my problem, but I have confidence there are plenty of smart people around here to help.
I have a 2 year old Dachshund-mix (10.5 lbs) who was fully housebroken about 2 months after I got him. He never went #2 in the house, only an occasional #1 during a thunderstorm or if I slept in on a Saturday morning. All was well until we "dog sitted" a friend's Pit Bull.
The other dog was only in our house for 2 days, but now our dog poops and pees in our house daily. He remains crate trained (8-10 hours 3-5 days a week, NEVER has had an accident in his crate) and he knows he is wrong when he goes in the house. He runs and hides and you can see it in his face he knows he was bad. This leads me to believe something else is wrong.
Things we have tried:
* Crate training (works perfectly)
* Praising him endlessly when he goes outside
* Walking him around 6-8 times a day. (Just this morning he was walked at 5:45am. He peed outside, and within the hour peed and pooped inside).
* Walking him for 5-20 minutes at a time.
* Giving him treats outside immediately afterwards instead of inside the house.
* Controlling when his food and water are down.
* Steam cleaned the carpets to remove the other dog's scent.
I have no idea what else to do. I'm going to the vet this week to see what they say, but I don't think its a medical problem. He can hold it in the crate. He knows how to tell us he needs to go, and does most of the time. He still poops and pees in the house daily.
Any other ideas?