It's all thanks to you @Wyorp Rock If you hadn't been helping me with my pullet, I never would have been able to respond here!Good post!
Hopefully you can get the vent cleared.
Now the question would be why is the vent clogged up on a rooster - what's causing it. I would give him foods as suggested, make sure he's drinking well.
Take time for a few days to see that his crop is emptying overnight. If you have access to a vet, a fecal float to see if worms are an issue would be a good idea too.
I hope we can both get our chickens back to normal! Keep us posted on your rooGreat idea I will try that with coconut oil. And the egg with yogurt too. Bless you for responding!