How old is my kitten?

Question

how old is he if his baby teeth are ready to fall out and the big ones are already almost up?

Answer 1

You can ask your vet that did the neuter last week since they've seen him recently and usually guesstimate they age for his charts when they do surgery anyways, but they generally lose their baby teeth between 4 and 8 months of age.  

Answer 2

ask it to meow twice is over 5 and meow 3 if under 5.