I'm curious about the set of behaviours I saw in Fraser today at the off leash park. He was playing happily with a 1 yr. spayed female, racing about and after a while showed a lot of interest in her rear end and then would do occasions of humping her. He's now 2 1/2 yrs old and even in his adolescence, wasn't big on humping legs and cushions etc. though even nowadays likes to hump his towel after being dried. I haven't seen him trying to hump a real dog. Then some more small dogs came onto the field and he began to race around with one of them (I think male), but this time he was rough and growling a lot, much, much rougher play than before. He doesn't normally growl when playing with other dogs, though I've heard him do it if the other dogs growls. Do you think he just got over stimulated with a lot going on, from the female dog he was initially humping to the entrance of more dogs onto the scene? The growl sounds pretty aggressive and worries me, especially as he was being so rough with the new dog on the scene who was holding its own, but the play seemed a bit on the edge of being more than play.
