could anyone help me to find out why my dogs miss their seasons. I have 5 bitches and was told that keeping a pack of dogs prevents regular season, is this true? I have peaple waiting for pups but there are no seasons. My dogs have never had health problems , all are fit and well with plenty of excercise and a well balanced diet of proplan. Their ages range from 14 mths to four years. Are there any herbal remedies?