Pacing the ladies

[winkydinks]

So I'm in my second year of breeding, and my experience is still limited. I only had one successful pairing last year (tried for two, but my second female had already ovulated by the time I paired her with my male). Anyways, it's been almost exactly a year since my girl who went last year was paired, and I'm considering trying her again.

What I'm wondering however, is if it's inappropriate to breed females in consecutive years. My veteran mom is at a healthy weight, but I know that breeding can be taxing on a female's body, especially considering the fact that she was a young (albeit successful) breeder last year. Am I being overly conservative?

Also, what's a good retirement age for moms?

Thanks!