Frustration does not even begin to describe how your feels when it is in limbo (going into heat, but there being no mate to be found). This is not a good state of mind for your dog. Spaying or neutering is essential if your dog does not have access to other dogs when it goes into heat.

A dog can get very moody, grumpy and uncooperative if it has to suffer through your indecision to fix it or let it mate.

If you leave your dog in limbo for too long, you may see your dog become withdrawn, or it may try to escape the confines of your yard. Make the decision as soon as possible, as your dog cannot stay in this state indefinitely. Read more on this at this website for the vets Colorado Springs.