This is my first post, my wife and I are new to raising chicks, and one of our 8 week old chicks named Fluffernutter is sick, it's puffed up not moving around and not eating much. We feed them Purina Medicated Start & Grow and she also feeds them lettuce and tomatoes as treats, they have been in the run now for about a week. Any ideas? Awesome site have learned a lot so far. Thank You !