ok, i will try to be more attentive to cleaning up his poo. He does not stay outside for more than 2-6 hours a day. often he is inside most of the day with the family. When i am outside I have yet to notice any fly problem when i am out back, but i usually don't spend more than 30 min outside unless its later in the day or i am doing yard work. thanks guys for the response. Sorry i didn't respond very quickly, i expected notifications when i received a reply.