Petsmart has some. I like the Busy Buddy Twist & Treat. I put his breakfast in there.
http://www.busybuddytoys.com/moreinfo.cfm?Product_ID=2
I also use his
Kong with both dry cookies and peanut butter, cream cheese, etc. Try to use good peanut butter - like an organic, unsalted kind you'd get at Trader Joes or a Whole Foods type place. Loki is like 9 pounds and he has a medium sized Kong. He likes the bigger one!
Then he has a
Giggle Treat Ball. It's big, but he knocks it around and treats fall out.
There's also something called a
buster cube which is similar.
Also, this is not interactive but Loki LOVES
Loopies.