Quote from the internet:
The age at which a tom cat sexually matures can vary greatly but in general it occurs between 5 and 12 months. Many factors can affect at which age a male cat starts spraying. Male cats in multi-cat households or in close proximity to other cats are more likely to spray at a younger age.
Spraying is territorial and can also be stress related. Neutering or spaying a kitten at an early age can prevent spraying problems in the future. Your veterinarian will advise you on the best age to neuter your kitten.
Multi-cat households usually have a far greater problem with spraying than single cat households. Overcrowding of cats will often result in problems with territory marking.
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Squirting him with water and locking him in a kennel at night is a great way to stress a cat out.
You also have 2 other cats.
In an apartment.
And now you want kittens.
And you'll probably keep one.
So now you'll have 4 cats in an apartment?
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