Veterinarians recommend desexing to prevent unwanted pregnancies in females. This is especially important for cats, as it is not always possible to tell when she is ‘on call’. In female dogs, desexing automatically stops their cycles and the associated bleeding and attention from male dogs.
Castration helps to control male dominance aggression problems and also reduces their wandering instincts if a female dog in the neighbourhood is on heat.
Tomcats have a tendency to roam and fight with other cats which can lead to other medical implications such as cat bite abscesses and FIV (Feline immunodeficiency virus).
Significant medical reasons
Spaying reduces the risk of mammary tumours (which can be life-threatening – just like breast cancer in women). Tumours of the ovaries, uterus and cervix and pyometra, a gross infection of the uterus, can also be prevented.
Castration can reduce the risk of prostatic disease, perianal tumours, and eliminates the risk of testicular cancers.
Desexing may also be recommended in your pet to prevent hereditary diseases being passed on, or for treatment of some diseases such as prostatic hypertrophy or pyometra. Select this link for more information on the medical and behavioural benefits of sterilisation