Nebo did that too one day....I think he was around the same age. He peed in the house at least 4 times in one day (errmm...my parents do not know about this lol) and I was SO frustrated with him! He hadn't done it for at least a week before that. For a while there I was worried about diabetes with him too, as he was drinking and peeing a lot. I don't know, he's fine now, hope Cooper is OK!