Okay, so I know y'all must get sick of hearing about my rats... but I couldn't think of a better place to turn to for advice about their food. Right now they are on the same dog food that my dogs are on (with many other things in their diet, of course) which is Blue Buffalo (fish and sweet potato formula). It contains 22% Protein and 12% Fat. The recommended levels for a RAT is 14-16% protein, and 4-5% fat. Now, Sky is a very active performance dog and I want to keep him on something with at least 18% protein. My idea is that I can keep 2 dogs and 3 rats all on the same food, but I'm beginning to lose hope that that will ever happen! Also, Sky has some sort of intolerance to dry foods with Chicken as the main protein source, yet eating a whole raw chicken has no effect on him.

Hence the Fish formula he's currently on. Sammie is a large-breed (border collie/newfoundland) dog and will be 9 years old this spring. I've noticed that some senior formulas are lower in protein and fat. The Blue Senior formula has Protein 18.0% and Fat 8.0%. I could put him on this, and make him share with the ratties, and keep Sky on his food. I guess the point of all this rambling is:
What foods do y'all know of that are lower in prot/fat and what is a good protein level for a very active adult dog like Sky?
Gee whiz, I stress myself out.