It sounds like a toy that gets batted around so that treats fall out of might be the best. It will be fun for your dogs and also allow your cat to get in on the action by stealing some of the treats as they come out.
You could try the Bionic Stuffer or the Starmark Treat Dispensing Bob-A-Lot. There are several other interactive toys you can look at, and we also carry cats toys, including ones that use 100% organic catnip.
If you're still looking for some ideas, check out our latest blog, tittled Why You Need Interactive Dog Toys.
Thanks for posting a question, and have fun watching your pets play!