In this situation I think I would MYOB about the food, but I would make an issue of the pee. I think it very, very, rude ( not to mention gross) to let a dog pee on someone else's stuff or in any shared space, which is pretty much a whole apartment as scent travels from room to room. If the dog cannot be left roaming the apartment because she will pee on something then she should be crated when no one is watching or leashed to her owner until she is fully trained so she doesn't have the opportunity to pee on anything. I would insist on potty training and containment for sanitary reasons. Other than that I would not get too involved with someone else's dog or how they take care of it. People are so sensitive about how they raise their pets. It's very similar to how sensitive they are about how they are raising their kids. Most people seem to not want to take any advice or constructive criticism.