The cat I had when I was younger went on a mini-hunger strike like that for a couple weeks. During that time we tried a few different foods and even tried adding a little bit of ketchup on top of her food for laughs. (LOL- she ate that up and after that nobody was able to leave tomatoes on the counter or ketchup on a plate without her attacking it!)
We finally got her to eat the food she was eating beforehand mixed with another brand. We mixed them the rest of her life til she passed (at 17 years).
The one she had been on was Purina Cat Chow and the one we ended up mixing in was ProPlan.
I've never been the type that is too particular about what brand I feed, I just want them to eat.
