I was noticing that one of my best layers is a bit thin. She is very healthy acting, alert, running, quacking, digging in the compost for worms, etc. I think its due to the cold weather (she really needs to molt, she has scraggly feathers from not molting since late spring) and her non-stop laying that is causing her to lose the weight. I have been watching her for the last couple of weeks and she really does seem to be in fine health except her weight. I have food available 24/7 of layer pellets and another dish of waterfowl. Also grit and oyster shell available. I throw in about a half cup of BOSS at bedtime for all 11 ducks. They all free range during the day. Seeing as everyone else is doing fine what would you suggest? She is a sweetie and it would be simple to give her something without the other getting it. More BOSS? Cat food? Calf manna? I have never used it for ducks before but would it help out here? Anything else to help her put on some weight?