I was wondering what the proper age is to spay? I have always heard to let a female have one heat, then get it done, but is that really true? I remember when our Jack Russell was a pup, she wore baby diapers for a week while she was in heat. We thought that was the proper way to go about it. But the thought of trying to wrestle a diaper on Ruby is not sounding very fun at the moment! Thoughts???