I'm not sure what the health problems would be to spay a dog at 7, I have a 7 year old male border collie that we never had done. My ex-husband would not allow me to get him fixed as his maculinity was at stake, he didn't want to be the only male in the house with two females, a female dog, two cats and a canary. By the time I got rid of the husband, I am now faced with an unneutred dog, the funny thing about it is I am sure that Gibson or Gibby as we call him, is gay. He definately is a virgin, when the next door neighbours female dog was in heat an managed to crawl under the fence, we found Gibson doing the shuffle, when he managed to get Jewel under him, he pushed her away and continued to do the shuffle on his own. Whenever our Molly gets a new haircut, or has a bath, Gibson wanders the house doing the shuffle, but only in the air. Sometimes its embarrasing but how can anyone be with a dog named Gibby.