Pawing!!!! Pacing!!!!!! SPOKING!!!!!! HELP!!!!!?

I work for a lady with a buckskin he is 11. He paws when it comes time to feed him he walks the fence. He seas a tree like 10000000 times but one day he will look at it like it just smacked him and jump like 10ft back. I don’t have a clue. Help. What do I do. I don't want to drug him.
 
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