Personally,i think if a buck finds a doe in estrous in july,he's going to breed her.A buck is in rut from the time his antlers harden until they fall off.The cooler weather and shorter days trigger excitement just as it does in us hunters.There are different "phases" of the rut,and that is what we look for.The girlies come into estrous and the boys get a whiff,and they start competing and chasing.I dont think it's actually starting yet though.They are just getting prepared maybe...JMO