What a precious little face! My standard poodle, Bella, turned 6 months on July 3rd. She has her spaying appointment on July 27th. Our vet said 6 months is the usual age for spaying. He said they can have their first heat anywhere from 6 mos. to 1 yr. so he prefers to do it at 6 mos. and hopefully avoid that first heat. I agree, that 4 months seems a little young.