Yeah it is, you should be able to get it at any vet, it can be a pill or an injection depending on how long it's been since the dog has been mated, my sister's dog was injected since it was within 72 hours

Something like this can explain it more https://breedingbusiness.com/morning-after-pill-dogs/

Did you get her the dog version of the morning after pill at the vet because I think it's like about a 80% chance she will get pregnant? Because I had to do this when my sisters young female dog got humped by her dad.