I don't think it's fear so much as an aversion to the smell of citrus fruits. Our cats have always hated the smell of oranges.

Went to the supermarket yesterday and a choir of dear little primary school children grouped near the checkouts sang Christmas carols. Although they weren't deaf,they had been taught Makaton (a basic deaf sign language for children) and were signing as they sang.
It was too much for me and I felt overwhelmed with sadness for SmokeyPokey. Husband trundled on with the trolley and I sat in the car mopping up the tears. Oh dear.