Flicka and Pepe are on Canidae, and Lillian is on Felidae...I rotate between All Life Stages, Lamb and Rice, and Chicken and Rice - I change every month. This month we're on Lamb and Rice. My other two fosters, Thor and Philly, are on whatever the fosters are eating.
My other foster, Molly, is a little bit of a chunky monkey, so she's on Canidae Platinum (for Seniors and Overweight)...you could try feeding that for Chloe and Jack?
As for the instructions on the back...I'd start with that...and if it seems like too much or not enough, or if you're just not sure, ask your vet. All of my dogs go with the feeding guidelines.
-Rosefern