My dog Jessie who's a 14 month old shepherd has recently started to have a ravenous appetite. I feed her close to 1600 calories a day with little weight gain. No parasites. Vet checked. Is there a food I could give her that will put some meat on he bones? She has (I think) chicken beef and possibly lamb allergies. She was on raw. I'm transitioning her off since I don't have the time, space or money to continue. Started transitioning to avoderm duck grain free mixed in with grandma Lucy pure performance rabbit.