I have three Pekins, one is fine, but the others have terrible leg weakness and can't walk. They are about three months old, and this has been going on for at least a month and a half while I have tried various things hoping for a solution. When they were still growing all three of them came down with it. At one point I inadvertently changed their food ( I just went to the hardware store and took what they said I should give them, it wasn't labeled because they break down their own Blue Seal bags and they had just made this one for me). When they started on that all three started walking again. The next time I went to get more food, I thought I was getting the same thing, shortly afterwards two of them came down with the leg weakness again. I have since gone back to what I think the food that made them well was (Grower-Cal), but it has not worked. I have tried feeding them eggs, bananas (things I have read worked for other people on the internet.), I have tried poultry vitamins and niacin pills in their water. I am very sad that I think I am going to have to put them down, so I am hoping maybe someone out there knows why this is happening and has some advice.