Are you feeding f/t or live? Is the prey appropriately sized? How are you introducing the prey item to your snake? Are you feeding in the enclosure or a separate container? Sorry to ask so many questions but the smallest thing can set a BP off food.

Recently my male went off feed for about a month. He was eating medium rats and like yours would strike and coil, but then lost interest and slithered off. I tried feeding an adult mouse last night and he eagerly gobbled it up. No idea why he suddenly dislikes nice fat rats!