Rooster not able to walk and bright green poo

[CochinLover1]

Hey guys, I recently had to euthanize one of my buckeye roosters because he was ill. He was not able to walk and we thought he was injured at first, but we couldn't find anything wrong with his legs or feet. He was pooping really bright green poo though. Well, later this week his son has come down with the same thing. Any ideas? Our last rooster is also starting to walk a little bit funny...

 

[Wyorp Rock]

Can you post photos or a video of him?
How old is he?
Was he vaccinated for Marek's?
The leg problems and bright green poo can be symptoms of Marek's among other things.
Since he is showing the same symptoms as the other Rooster that died, then it is most like an illness instead of a nutritional/vitamin B deficiency , but it won't hurt to give him some poultry vitamins to see if that will help.

https://www.backyardchickens.com/a/the-great-big-giant-mareks-disease-faq

 

[CochinLover1]

We did more research, and, it is marek's. Will be euthanizing soon.

 

[Wyorp Rock]

We did more research, and, it is marek's. Will be euthanizing soon.

I'm so sorry to hear.
Will you be sending him for necropsy?