Just noticed this today as he was completely fine (and crowing) yesterday. My rooster stands in one spot kind of hunkered with his tail completely spread out. He can fly up to the perch still, but his balance on it is pretty poor. He loses his balance when he tries to run away from me, as well. So far, droppings are still normal and he's the only one showing symptoms. Want to know what potential causes could be so I can nip this in the bud before it becomes a larger issue. Edit: I've added some photos. One was taken yesterday with a digital camera. The other two were taken JUST NOW with my cell phone. Also, he pooped right as I took the first one and it was runny. (You'll see it in the pic.) This is the picture you can see the poop in. His comb is also much darker today compared to yesterday. No, it's not from the cold. I'm in South Texas and it has been in the 60's and 70's. This picture shows the weird way he's holding his tail. He lost his balance both when he jumped onto the cage and when he jumped off. His steps were very slow and deliberate even though he was afraid of me.