
If a bitch is fit and well then 8 is not old for a litter in exceptional circumstances with prior application and veterinary approval the KC will register a litter from a bitch of this age.
The KC only brought in the upper and lower age limits for all bitches quite recently.
It is not unusual 8in some breeds in other countries for quite old bitches to have litters, but usually this is for specific reasons.
I know one breeder who will mate a bitch when young and then folllow the offsprings health until full maturity when she will have a second litter at around 7 years of age. She will only7 use an oldeer stud on a young bitch and vice verasa so hoping to minimise healoth issues that may only become apparent later in life.
Her line seems to be particularly long lived.