About a week ago we bought 6 chicks from TS. Up until now they've all been acting super healthy and active. This morning however I noticed one little baby (my favorite one, go figure) just laying down when the others were all standing, she hopped up when I put my hand near her but seems very wobbly on her feet and went right back to laying down even getting stepped on by the others. I have corid but I'm not sure if these chicks were vaccinated or not. Should I try to treat with corrid, should I try sav a chick or something else? Help!