The Parsemus Foundation is an educational resource for the public and veterinarians about the importance of hormones for pets. Over the years, we have received increasing inquiries about hormone-sparing sterilization from pet parents, and seen more veterinarians offering vasectomy or hysterectomy. But the shift in practice has been slow — until now. With several influential veterinarians spreading the message about the importance of hormones to dogs, this topic has finally reached the mainstream.