I would suggest that you either build him an enclosure to have outdoor time or cat proof the garden and let him play out there.

You could also try distracting him if you really don't want him to go out.

Everytime he cries at the door offer him a tasty treat to come to you and start playing a game with him, get him a chasing a ball or piece of string etc.

Hopefully he will forget that he wanted to go out and if you do it enough times it can break the habit.

It dosn't work with all cats however.

Maybe it's worth having a chat with his breeder?

Find out if he has showed this behavour before and what was done to combat, she may even be happy for him to have outdoor access as long as it is supervised.

I know I wouldn't mind kittens I breed to go outdoors I will just not allow them to free roam as it is far too dangerous.

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