Injured Rooster

[BackyardinWales]

My rooster has been in a cage in my bathroom for 4 weeks.

Can I just put him back in his pen (after we see the vet tomorrow) as he is one of two roosters in that pen, or is it still put him in after lights out?

(Never had to deal with this situation before)

Thank you in advance.

 

[DobieLover]

What is the ambient temperature outside in Wales right now? Having him in a warm house for a month and then putting him out in the cold could be enough stress to kill him. Also putting him in the coop after lights out is another recipe for disaster. The birds won't remember him and having another male suddenly show up when you already have a rooster in the flock could cause a very bad fight. How was the temporary house rooster injured in the first place?
Please post pictures of your setup.