As promised to Bobioden (Bob), here are some pics of Libby's foraging toys. I purchased most of them locally, but I'm sure they're available on line too.
Here's the one I started with, very simple, plus I showed her the treat inside to get her started.
Then she graduated to this one -- took her a couple of days, plus the bottom cup is the heaviest. Now she can empty it in about ten minutes!
This one is fairly simple, but she has to work to get the treats out. It also comes in a round shape.
This one took her a while -- I even had a time figuring out how to LOAD it! LOL! Each color is a different section and has a hold in the bottom. There's little bow shaped "nubs" on the outside of each section. She has to push and pull the nubs and line up the holes to get the treats to fall to the bottom, where there's an opening where she can get the treats. This took her a while to figure out. She'd get mad at it, give it a good "bonk" and walk away, only to come back later. Now she can empty it in about 20 minutes! Smarty pants!
This carosel stays in her cage all the time, so she works on it frequently.
This is really a favorite of hers. The ball unscrews to load the treats and there are slots in the bottom for her to get to them. It wasn't hard for her to figure out, but she had to work to get the treats out. I added the bell at the bottom so I could hear when she was working on it. The rod through the middle also acts as a skewer to put fruit and veggies on.
This one is her latest and is really tough! The top unscrews to load the treats. The blue things are levers that have holes in them. She has to push and pull the levers to get the treats to fall all the way to the bottom. The treats can't be too large, or they won't fit through the holes. She works on this one a lot and usually just bangs on it and jiggles it until some of the treats fall to the bottom!
I usually give her one of these every other day or so. It's amazing to watch her working to figure out how to get the treats!