Am I feeding enough?

Amber is a good sized cat and is a bit plump. Tiger is gigantic
(possible Maine Coon). He weighed in at 25 pounds at his last vet visit
in June. The vet said he should lose some weight. I am feeding one 5.5
ounce can of Wellness for the two cats in the morning and again in the
late afternoon. They get a small amount of dry Wellness at noon and
again at bedtime. Both cats are inside only and are not very active -
sleeping a lot. They appear to have lost some weight but are not skinny
by any means. Am I giving them enough to eat?


---MIKE---