An unwanted litter sees an increase in strays and shelters being overpopulated with animals they may not be able to rehome. This can also result in feral cats and semi-wild dogs roaming the streets. Animals that are left intact are often more aggressive and may wander the streets and also fight with other animals. Desexing removes the worst of the territorial instinct and also stops pets from causing havoc when trying to mate with another animal. Desexing will also increase your pets expected life span and reduce the risk of various infections and certain cancers in dogs and cats. Your pet should be desexed by 6 months of age before they come in to heat. Your vet will explain the procedure as well as what is required for aftercare to ensure your pet recovers well after surgery.