How many "Lassie" feature films starred the animal actor Pal portraying "Lassie"?

18 years for a 60ish pound dog is much more than 85 "dog years".

Sassy, the seven year multiplication is a rough guide only. It depends on the breed and size of dog usually ranging from about 6 to about 8. The smaller dogs tend to live longer so have a lower number. 85 divided by 18 is under 5 dog years per human which seems easy too low for that breed.

Are dog years multipled by seven to equal human years?