Should I limit protein in healthy 15-16 year olds?

They are now on a organic raw diet and loving it. However, I noticed between a 9 lb cat, an 11 lb cat, and my 7 lb dog, they are going through almost a pound of lamb a day plus he cats are finishing up a commercial raw poultry diet (about 2-4 oz a day between them watered down) and get a bit of urinary kibble and the cats both eat wayyy more lamb than the dog, who only gets 2 oz a day plus veggies and dried organs. All are a good healthy weight, Now the lamb is lamb stew meat, so I do have to remove a good bit of bone and solid fat from each 1 lb package, but the average lean meat yield is about 10 oz, so they're going through (each) 4 oz solid lean meat + 2 oz chicken, organs, and veggies + Wysong Uretic kibble(only for one) + Wellness probiotic treats + the occasional chunk of fat. This seems a bit much, considering the dog isn't much littler and only gets 2 oz of meat + 1 oz of veggies + dehydrated organs and kangaroo strips and is perfect weight and bursting with energy. but the kitties are doing wonderful, and I'd hate to mess with a good thing...