YanchaOkami
Esteemed Citizen of ZV
Do bitches have a hymen like human females do? Would a vet be able to tell if she’s previously had sex or been played with prior to being spayed?
They do have a hymen, but as dogs are ways more active / movement-related with their lower core and body musculature, it's through adaptive evolution not something which easily tends to "tear" - it merely widens in most cases. Else it would tear by plain playful or all-day activities. And it doesn't have to cover a majority amount of the internal diameter on it's position.
And no, a veterinary does not check a female dog's hymen. ?

That's just no topic any veterinary I ever knew would even think once about, let alone twice.