Are you weighing them? Are they pooping okay? It depends on what kind of food and how many kcals in each. Their tummies will definitely stick out after but shouldn't be rock hard.
You can mix extra water with the canned food to make sure they're staying hydrated.
I talk to him when I'm lonesome like; and I'm sure he understands. When he looks at me so attentively, and gently licks my hands; then he rubs his nose on my tailored clothes, but I never say naught thereat. For the good Lord knows I can buy more clothes, but never a friend like that. ~W. Dayton Wedgefarth
Buddy - 13 yr old angel disguised as a "pitbull" (according to the provincial government)
Obi - 6 year old incorrigible boxer mix