I just had my 10 month old Great Pyrenees/Pitbull mix spayed 2 days ago. She has never came into heat, but since being spayed the males haven't left her alone. We have 2 intact males (her brother and father) and another temporarily staying at our house. The only one who doesnt constantly annoy her is her brother. The other 2 keep sniffing her, and licking at her. On looking it up I read that if ovarian tissue is left behind it could still trigger the hormones associated with a heat cycle, but why would that happen immediately after being spayed? Are they just sniffing because she smells different now, and it will soon pass? Anyone else had this happen?