My boyfriend and I just adopted a two year old boxer. He's playful and lively. We noticed yesterday that he was having a normal bowel movement but then he started acting like he wasn't done going and would just squat and nothing would come out. Tonight we were walking both our dogs and he was doing the same thing, but towards the end of our walk a little bit of water was coming out. He's eating normally, he's drinking normally. He's playful and everything. Does anyone know what could be wrong?