My last horse was such a weirdo when it came to treats. He was very picky about what he wanted. He didn’t like apples, carrots were fine, but I kept a stash of graham crackers for him in my trunk that he absolutely loved. His very favorite though was french fries.
I was grazing him after cross country at one of our events while we waited for the results to finalize and my mom bought me your fare standard chicken tenders and french fries for lunch from the vendor. He started going nuts trying to get some from me, so I let him try a french fry, thinking he would spit it out. Nope. Started going even crazier trying to get more! My mom had to take him so I could eat in peace. Such a little weirdo.