Hi, Max's Mommy.

You have two potential problems. First of all, a girl kitty living with an intact male can become pregnant before you even realize she's been in season.

Secondly, neutering males at too young an age is possibly partially responsible for later development of Feline Urological Syndrome.

But, you may have two boys, it's sometimes really hard to tell. I had a boy who was originally sexed a girl because he had undescended testacles. I had a girl who was originally sexed as a boy because she had two tufts of fur in the ahem, appropriate place.

When you take the kitty in for shots you can have the vet determine the sex and talk about what's best at that time.

For what it's worth, I had a kitty who was eleven months old when he was neutered and he was troubled with FUS his entire life. My big guy Big was done at four months, and even though he's not quite three he so far has had no problems.