Is my roommate hitting my dog?

Courtney
Hey y'all so I need your opinions. My fiancé, Joey, and I have 2 dogs. A German shepherd named Chibbs and an Italian mastiff named Nora. Joeys brother, John, currently lives with us and we had an extra room so we decided to rent it out to one of Johns friends. He has lived with us for about 4 months and Joey and I don't really know a whole lot about him besides the fact that he doesn't really care for Chibbs. Chibbs is a year old so still in the puppy stage but he is a great dog! Gets a little rowdy playing but that's it. Well this morning I was about to leave for work and the roommate told me that Chibbs peed on the couch (WHICH HE NEVER DOES). We have a doggie door and he knows better. The only time Chibbs will pee in the house is if he is scared for being hit. So I only have reason to believe that he hit him because there is literally no explanation. I told my fiancé and he believes he did as well just based on how he has handled the dogs in the past. Let me know your opinions and give me some advice on what to do! It makes me so sad to think that my poor pup would be getting hit while we aren't home or asleep.

Vote below to see results!