My two are indoor/outdoor but I live in an area mostly populated by older people with large gardens back-to-back.

I have a catflap and they are in at dusk and kept in overnight. I am aware of the risks.

If I lived elsewhere in my town I would get the garden cat proofed.

Forgot to say: I told the breeder they would be indoor/outdoor. I also know that many breeders of pedigrees stipulate indoor only as a condition.