As of the age from 6 to 7 months, the small male becomes pubescent. The testicles produce the spermatozoa but also sex hormones of which testosterone, responsible for the whole-male’s behaviour. If your male is not intended to be a stud cat, it is advised to have it castrated at the age of 6 months, before its puberty. It will not be unhappy and will have a higher life expectancy. Its behaviour will be closer to its Master and thus less independent. To sterilize a male cat especially if it goes outside, also makes it possible to limit the proliferation of the cats which poses many problems. Each year, many kittens are abandoned because they do not find a Master.
A whole male (not operated) cat is very territorial. He will limit its territory by a urinary marking, jets of urines. The urine of a whole male has a very strong odour that is difficult to mask. Marking will impregnate your walls and pieces of furniture. If your cat leaves, he will tend to mark the trees, the shrubs, and any place on his territory. He will keep in memory each place, and will return there, regularly. Marking increases to a significant degree in the vicinity of a she-cat in heat. If your whole cat lives in apartment but he felt the presence of a female in heat, his mewing is noisy and cause nuisance. There is another style of marking there is scratches. The cat will attack your pieces of furniture, carpet, walls, ground, or with the trees of the garden. When a cat took the practice of marking at certain places of your residence, this rite remains and is very difficult to correct.
The whole males spend much time outside to drive out, fighting with their congener, and following the females in heats. During reproduction periods, the risk of road accident increase. Fights between cats cause bites and scratches. These wounds frequently evolve/turn into abscess and require a visit to the veterinary surgeon. Two viral diseases of the cat are transmitted at the time of contact between cats and more particularly at the time of bites : Leucosis (FeLV) and the AIDS of cat (FIV). These diseases are fatal. It is possible to vaccinate your cat against leucosis but not against the AIDS of the cat.
If you to decide to make castrate an already adult cat, it should be known that he will have already taken bad habits (marking, running away, brawls). These bad habits will be attenuated but they will not disappear completely.
The life expectancy of the whole cat is on average shorter than that of the castrated cat.
A castrated male the castrated cat has a territory often smaller compared to the whole male : his territory is limited to the house and garden, and his character is more familiar, softer. He will be much more affectionate towards his Master.
A castrated cat has less energy needs than a whole male. In addition, he is less active, especially if he lives in an apartment. The gain of weight occurs 2 to 3 months after castration.
It is thus necessary to restrict his caloric intake, either by decreasing the quantity of distributed food, or by giving him a food reduced in calories per days which follow his castration. If you reduce his energy intake, your cat will remain slender and active and it will not suffer from the complications due to obesity like diabetes, cardiac, and articular problems. To avoid urinary disorders, you must check that your cat drinks and urinates sufficiently. A food of good quality prevents the appearance of urinary calculations by eating a balance of minerals such as phosphates.