We have been having a problem with some of our hens and I'm hoping someone might have some insight to help us with! About 2 months ago one of our White leghorn hens developed a limp, at the time we checked for an injuries on her leg or foot but found nothing. We have been closely watching her and some days she will limp where as other days you would never be able to tell that she has a limp at all. She is about 8 months old. We figured because she was a little more of a flighty bird maybe she landed on it wrong and that we would keep an eye on her because she was eating, drinking well, laying normal, and not getting picked on from the other hens. That was until about 3 weeks ago when another one of our hens started limping as well, same as the other no injuries and everything else ok. Then 2 weeks ago we had another hen pass away suddenly. She laid an embryo egg and passed away within a few hours, I think due to an impacted egg but not for sure. I just thought it was worth mentioning since I'm not sure what is going on right now. We have not vaccinated any of the chickens and I'm not sure if the farmer we purchased them from did either. We have added vitamins/ electrolytes to their water for the last 2 weeks as I have seen this recommended for chickens with these types of problems. We have also been adding some homemade yogurt and extra protein to their diet to hopefully help but so far it hasn't. The thing that is concerning to me is the fact that yesterday and today she will walk a couple steps and then flop down on the ground but she has no limp really. It almost seems like her leg and now her wing as well are just giving out or are becoming paralyzed. For now we have moved her into the house to keep her warm since the last 2 nights have been in the teens, and keep her from jumping and hurting her leg even more. Her stools have been just fine until yesterday evening and now they started becoming water. I'm worried that if I don't do something we will loose her, but I'm not sure what exactly it could be. Something I am finding interesting is the fact that none of my Iza Brown hens have been effected from this only our White Leghorns, as of right now. I am planning on heading over to Tractor Supply this morning to pick up some antibiotics because that is the only thing left I can think to do. I just need help on if I should treat the rest of the hens to, or ideas on what could be going would be such a blessing! Thank you!!