Leaving Farmers Dog

We have been feeding our 5 year old beagle Farmers Dog for 1 year now, but would like to find something less expensive, that travels better. Our biggest concern is getting healthy volume, and low calorie. She needs to still loose a few pounds so her food can only add to 370kcal/ day.

Volume we can supplement with veggies, what recommendations do you have? She is NOT a picky eater in the least.

TIA