I'm surprised he kept it for so long! My kittens were long overdue at 7months, being total pests to the female kittens
We had to wait, vets did not recommended doing it in autumn. He had several health issues; only after he became stronger, it was time for a new decisive stage in his life. In a month we'll move to a summer house, and he'll arrive there already recovered and vaccinated. The vet recommended us to give him a double course of vaccines.
Double course of vaccines is important and being strong enough for surgery. Mine were not yet vaccinated and got Panleukopenia (Parvovirus), and at the time there were two separate litters of kittens and the younger ones all died from it 😿 and the older ones managed to recover with careful nursing so I had to wait for them to be strong enough to undergo surgery after that
😿😿
we were recommended two, for it is his 1st vaccination in life (the vet told us so)