Hello everyone , I'm very new to raising chickens ,we have two 3 month old Isa chicks and 1 of them is not doing well ,it all started about 2 weeks ago , for 2 days she had what looked to us like seizures she had 2 one day and like 5 the next day ,she would start jurking and flop around the coop for about 5to 10 sec then just lay for a few mins , we thought she was a gonner ,but sence then she just stands with feathers fluffed and head tucked ,she eats and drinks but very little ,not like her sister ,she is pooping ..hardly and scraching ,,just nothing standing. when i ipen the coop in the mornings to let then out she is standing in the corner same way ,we just don't know what to do for her ,if anyone has and ideas i would be most greatful she is the sweetest chicken.