Roosters left leg is completely limp and he can't stand

[Eggcessive]

Here is another thread about the same chicken:
https://www.backyardchickens.com/threads/injured-rooster-please-help.1437783/

 

[6xChickenmom]

How old is he? Was he vaccinated for Marek's?

He's 7/8 months old, and no. I haven't had him vaccinated for that

 

[6xChickenmom]

When you lifted him up, did his legs react the same (do the toes move?)

Yeah!! They were both the same, toes move, and as I was feeling around, and bending his legs, he didn't jerk or make any movements like I hit a sensitive area

 

[SweetKeeks5]

Yeah!! They were both the same, toes move, and as I was feeling around, and bending his legs, he didn't jerk or make any movements like I hit a sensitive area

I know this web is for a chicken but I think some of the same rules apply (besides checking for egg binding) it looks around the same. But I’m not sure
https://www.theartofdoingstuff.com/my-hen-is-limping-how-to-fix-it-a-gimpy-chicken/