I need suggestions on a dry dog food that won't put weight on Charlie.

The Pedigree Healthy Weight is now costing me $25 for 14#'s.

He is doing so well on it for years now but it is getting rarer to find and Chewy is too expensive and other stores rarely carry it.

Any suggestions? I really need to change to a new dry food for Charlie but have no clue what to consider.

Any advice?