Hi, I'm new to this forum and wondered if anyone could help me with our problem, we hatched off 9 what we thought were healthy chicks in April/May (one lot of 4 and one lot of 5) as they grew one of them (first lot of chicks) lost the use of her legs and caused quite a scene as she would try and hobble her way around, then her sister (hatched at same time) also seemed to develop this problem, however she became so bad that she couldn't move and was squawking in pain - unfortunately we had to do what was best for her there and then and shes gone. The first chick now has reduced growth compared to the younger set of chicks we hatched two weeks later. However i noticed only a few weeks ago that one chick out of the second set also started walking around on what i can only describe as her knees - she now also loses balance but as she is far bigger than the first chick she struggles a lot more. When I pick the girls up their legs are almost like jelly and their feet are almost closed up, we have tried to find out what the possible cause is but cannot find anything of help, we've reared chicks before and never come across this problem and I'm wondering if its a disease spread through them? All the other chicks are now with all our other hens and are quite happy but i refused to add the two poorly ones in for fear of them being killed by the cockerel in there as they are so weak, so at the moment they have free roam of the garden - I'm also wondering is it fair to continue to prolong their life when all they do is eat, drink and hide under a fir tree all day? Any help would be greatly appreciated.