Ever since I've moved the only dogs around for my boy to play with are the neighbors two females. There are no dog parks and the day care won't take him because he's intact (though, after touring the place I wouldn't take him there anyways). I've worked in dog boarding/daycare for a while and I've seen dogs in heat. However, they were always short haired. One of the girls he plays with is not spayed and about 10.5 months old so it could happen any day. I'm very vigilant about watching them play and watching for signs but so far I"ve seen nothing. However, he has become fond of occasionally licking her behind. Could this be a sign that she is going into heat soon?