Cloud was 3 years 9 months
Tilly was unknown, but I would have said middle aged at least.
Summer was unknown but was as old as the hills.
Sweep was 9 years one month
Sunshine was 7 years 7 months
Moon was 1 year 5 months
Boofa was 2 years 7 months
Tubby was 11 years 11 months
Ozzy was 2 years
Flash was 9 months and 15 days
Prior to that we have had many, and they were varied ages too.