I have a 2 year old German Shepherd who’s about 45lbs that won’t put on weight. She eats a raw diet and we’ve been feeding her 2.5lbs of food per day which is substantial. She’s an active dog but I don’t see why she wouldn’t gain any weight eating that much food. She has been tested for epi and parasites, negative on both. She also looks underdeveloped, as if she’s stuck in her puppy phase. Has anyone else experienced this with their dog or have any insight? Thanks.