Haha, I tried to feed Popcorn frozen (cooked) kale once - and only once. I had read that kale was one veggie that was better served cooked or something. Since I had some in the freezer, I decided to try it out and see if he liked it.
He is a begger, and will wheek to high heavens when he knows it's mealtime, standing on his back legs, little front paws on the bars of the cage. When I put the bowl of kale in the cage, he rushed over to it... and just stared at it. Then he looked up at me, and I could swear he was giving me a confused face, like, "what the heck is this??" He ran over to me and started wheeking again for more food.
He didn't touch the kale all day. He prefers some veggies more than others, but even the ones that he seems to not care for will be eaten in a few hours. Not the kale. Not even one nibble.
I won't be trying that again!