My 2 year old beagle went into heat in November of 2009. She has never gone into heat again. I didn't get her spayed. She does have one nipple that didn't grow in but the vet told me that's not abnormal. She lived with a boy stray we took in for six months but he was only about 9 months at the time. They never made any puppies. I don't want to breed my girl but should I get her spayed when she never goes into heat? Could she be sick? Honestly the one time I thought she was in heat was because boy dogs that had been after the neighbor's dog when she was in heat started coming into my yard. I never saw any blood from my girl though and she is an inside dog and we have white furniture so I should have seen something if she was bleeding. So I should say maybe she went into heat once.