I hope someone can help me. I feed my babies Stella and Chewy's Fresh from the Farm duck. They absolutely love it, but seem hungry after being fed. I've checked and double checked the portions for their weight and exercise, so I'm feeding correct amount. They also get Stella and Chewy's treat at least once a day, sometimes twice. Even if I give veggies...Gus, my middle, always wants more. Any advice?