It depends on the dog. If the last one was tough for her I would imagine this one would be as well. It is a tough call. There is no age that is too old. Some dogs are too old at 8 others still doing it at 12-12-13. I have a bitch now that I bred when she was 10. I was planning to breed her again because she did so well at ten, when she cam in heat she bled for about two or three days and dried up. Vet check said she was not 'in' and she has not been 'in' since. She is going on 13 now.

Best of luck. EWO