I have never seen these before but they look like a great idea. Just like kongs with dogs they seem like they would be great toys because they are durable and the catnip would be enticing and entertaining for the cats. I think some of the cats at my humane society would love these.

Pros: durable, exciting (catnip)

Cons: n/a

Hmmm this looks interesting I will have to go find one and try it out. My cats love moving toys and kong is durable so this should work.

Pros: Cats should like it

Cons: ?