I have an 11 1/2 year old (Buster the lionlop), an 11 year old (Barney, my first ever bunny) and his wife Summer Pudding who is about 10 now, and loads between the ages of 4-10 (mostly around the 8-9 mark).
In rescue I have a pair of 6 year olds, a pair where one is 7 and the partner is 6 1/2.