Kimber enjoyed her Kong wobbler last night!
Other lab-tested food toys:
Busy Buddy Tug-a-jug. You do need to watch that the pup doesn't chew on the rope, but it's a great mind challenge: Busy Buddy Tug-A-Jug Dog Toy, Medium/large - Chewy.com
Nina Ottoson makes a range of excellent dog game puzzles. They are spendy, but well made, and every now and then you can run across a 50% off sale. (I've only bought the plastic ones so they can go in the dishwasher) Kimber likes the Casino: Amazon.com: Nina Ottosson