Raw treats to put inside one of those treat-dispensing toys?

So I bought one of these cat toys that dispense cat treats off of Amazon:  

Obviously I'm not going to fill it with dry food, but does anyone have suggestions of what I CAN stuff it with? I feed her Life Essentials Freeze Dried Chicken treats, but they are very dusty and leave residue all over my floor. I also tried filling it with some of the freeze dried chicken they sell on hare-today, which I needed to cut with kitchen shears first since they are much harder, but they kind of shatter when I cut them. Any suggestions?

I've thought of doing this for when I'm away for 11 hours at work. Ritz tends to throw up if she hasn't had any food for longer than 10 hours (acid ingestion). I haven't tried it yet, but thanks for giving me a push.
This and this might fit in the ball.
I also like Bravo Buffalo bites, they are more uniform in size than PureBites and a protein Ritz rarely gets othewwise.
I have found that the only difference within the same brand/product between freeze dried treats for dogs and cats is the size of the treats. So if size of the cat treats are too small you can use the dog size ones.