I have a 1 year old male mini Australian shepherd that we rescued when he was 10 months old (we have had him 3 months). He is house broken but sometimes ( 2 or 3 times a week) will pee in the house. There is no rhyme or reason to it as there is no particular location or time when he does it. He goes out regularly and will do this after an hour or two after a long walk or after being outside. We know he goes on those occassions. We get him out regularly but this has not seemed to stem the flow. If this was more regular i would think it was a urinary tract infection but it is random and infrequent. It has also only been occurring in the past month or so. We have no new pets or other events that we can point to causing this. We are not sure what to do to correct this. Suggestions?