Is there a way to tell if a female dog has been fixed?

Question

My dog was given to me over a year ago, she hasn't shown any signs of being in heat.

Answer 1

If you got her as adult and she hasn't gone into heat in a year chances are she was spayed but unless the vet that spayed her applied a tattoo to her abdomen or your vet can see the scar there is no way to know for sure except surgery

Answer 2

If you've had her for a year, and she hasn't gone into heat, then it's safe to say she's been spayed.  Female dogs will go into season 1-3 times per year, depending on breed and the individual dog.  

Answer 3

dogs come into heat every 6 month or so and if she hasnt come into heat yet she must be fixed

Answer 4

You mean aside from the huge scar on the abdomen?

Answer 5

Ask the vet to check for scar tissue on her tummy. I would double check. More then likely she is. Why not ask the people who gave her to you? Im sure they might be able to tell you her old vet!