We recommend sterilising all your cats or dogs at 5 months of age. This ensures that your pets have enough time to grow and develop and also decreases their risk of complications because of anaesthesia. Furthermore, there are various advantages of spaying or castrating your pet before it becomes sexually mature. Some of these advantages include a decreased risk of certain medical conditions, e.g. certain cancers and uterine infections, avoiding unwanted behaviour or aggression, and not having unexpected, unwanted litters.