Timmy is molting and preening himself a bit but tends to look/act itchy but of course wont let me help him bc hes a little scaredy boy, he freaks out when i sprinkle some water on him to help, and ideas?

I have a question about my 14 year old male parrotlet. I am extremely concerned and covering every avenue to find out what is wrong with my little guy. I uncovered Georgie this morning to find all the feathers, on one side his chest, laying on the floor of his cage. I was completely shocked and...