DUBBING ROOSTER

I’m worried about dubbing my rooster. I know he will bleed a lot but he has been struggling to live with his big comb and waddle to the point he can no longer eat on his own and he can’t see properly on his other eye. Is it still possible to dub his comb when it’s this thick? And shouldn’t it be dubbed close to his head? I am so scared but I know he needs this

(I’m holding up his comb like this because I don’t know how to show it otherwise)

Edit: Thank you for all the advice everyone!

Even if I trim his beak, he really can’t peck without his waddle getting in the way or missing his food by a few centimeters because he can’t see well with his other eye.

I decided to not dub him for now until I have the means to go to a vet. (Also I will not be the one doing the dubbing, I can’t even stand seeing him bleed! 😭😭) For clarification, my relatives who have raised chickens always suggest on dubbing him themselves since that is how they normally do it with their chickens. I’m getting more info because I’m unsure whether or not I should go with this procedure since my chicken’s comb is this thick… But I was also thinking that his problems might get more serious in the future.

As of now, the only significant struggle he faces with his huge comb is just his inability to eat on his own, otherwise I just hand-feed him his food. As for drinking water, he can actually do it on his own, idk why he struggles with eating.

Btw he’s a house pet, and I don’t want to take care of more chickens. He is my only child, so yeah, no breeding will be done!