can anyone advise a low protein food for 3yr old medium size dog , but don,t want to lose any weight

I have just started feeding CSJ, might be worth having a chat with Ceri about a potentially suitable food, she is very helpful and knowledgeable. They have a good range of foods and prices which should suit just about anyone IMO. My girl absolutely loves the salmon and rice after refusing to eat her AG! Ceri's email is:     ceri@csjk9.com