Maybe....or a misinterpretation as @LaFleche is from germany and am not certain if english is their first language or could be a colloquialism not common in the US.
A lime?
Only you can decide.
If the hens are not being unduly harassed(to where they are hiding and/or not getting enough to eat or drink) or being wounded due to the lack of feathers, keep him.
When and how will you integrate the new chicks?
How he reacts to them may be telling as to his...
Ditto Dat.
How long have you had him?
Feather loss from mating can be bad technique on the males part and/or brittle feathers on the females part.
Why do you want a male in the flock?
Why are you adding 4 more birds and how old are they?
If you are hoping the addition will reduce any damage...