Deciding whether to castrate or not
Castrating or neutering a male dog is an operation requiring a general anaesthetic. Both testicles are removed. As with all operations, the advantages and disadvantages should be considered carefully before deciding. Your own vet is the best person to advise you about your particular dog, but the following general advice may also help.
The main advantages of castrating a male dog are prevention of breeding, prevention of testicular cancer, reduction in the risk of prostate problems (including prostate cancer) and modification of certain behaviours. Only behaviours which are related to male hormone levels will be improved, so castration is never an alternative to proper socialisation and training. For example, a tendency to escape and run away will improve if your dog is chasing the scent of a bitch in season, but not if your dog is just untrained and wilful. An aggressive dog can be improved by castration if the cause is related to his male hormone levels, but not if your dog has not been well socialised and is afraid of people and other dogs.
The main disadvantages of having your dog castrated are the risks associated with any general anaesthetic and any operation, but these are very small risks when compared to the potential benefits.
Dog owners often ask whether their dog’s character will be changed by castration. In my opinion it is unchanged unless it is a change for the better (as in certain behaviours mentioned above). Another common worry is that a dog will become overweight and lethargic after castration, but this is 100% preventable with the correct diet and exercise.
Deciding when to castrate
The best age to castrate depends on the reason for doing so. If it is a planned procedure, it might well be carried out at 9-12 months of age, if your vet is happy that your dog is physically mature enough. If castration is advised for behavioural reasons, it might not be obvious until 1-2 years of age that there is a need for it. When castration is carried out later in life, the positive changes might not be quite so great, but your dog is never too old to castrate if there is a medical reason for it, like a testicular tumour……….