|It takes a lot of monkey interaction to obtain the handful of treats
housed in the Shaker Puzzle. Easily filled with treats, the Shaker Puzzle
provides in-cage enrichment as the monkey works to obtain the enclosed treats.
Operation is time consuming, as one or two treats will fall out of the tube
each time the monkey turns it over. Made of polycarbonate plastic and a
stainless steel thru-bolt, it may be repeatedly sanitized. A 7/16"
wrench is required to tighten the thru-bolt, not included. Shaker Puzzles
are made for four different food types. Protected by U.S. Patent No. 5,232,130.|