Help! Im not sure whats wrong with my rooster!

My 2 year old rooster is not able to walk or stand. Over a month ago I noticed that when he walked he was a little wobbly, like he was drunk. Over the next while he slowly got worse where he would fall over completely. I came home two weeks ago to find him stuck under the barn ramp and not able to hold himself up at all. He has now been in my living room for the last two weeks unable to get off his side. His legs vibrate/tremble constantly. He is eating and drinking with help. I have to hold him up. His poop seems regular, I clean him daily. All my hens are healthy, he is my only rooster. Has anyone experienced anything similar? Nothing Ive looked up seems to fit. I just want my walter to get better