I'm really stumped on this. I cleared the Mooshroom's original drops, and set new drops in my CustomDropEvent. However, mooshrooms are dropping cowhide instead of mooshroom hide, and are not dropping red mushrooms. Here's the section of code that deals with EntityMooshroom:
I recommend always trying to solve the problem first. I have noticed a lot of your post are solved by you a couple minutes. That is good to be able to solve them but maybe you should wait longer before posting.
Rollback Post to RevisionRollBack
I am starting do small simple mod request. If the mod can be made in an hour I will do it for you.