Treats for Hydrolyzed Diet

Hi! My cat is on the Hills Hydrolyzed diet due to protein allergies in food. She also gets the hydrolyzed treats from Royal Canin. I wanted to know if anyone has found an additional type of treat that their cat does well with to switch things up. She’ll be completely fine if not, but she’s very food driven and she used to loooovvveee the liquid tube treats so I was hoping to find her something else she can eat!

I tried single ingredient duck liver treats due to it being a novel protein but those made her pull out her fur again.