What's the difference between a snuffle mat, a treat dispenser, and a puzzle feeder?

A snuffle mat is a fabric mat with strips of fleece that hide kibble for the dog to sniff out, encouraging natural foraging. A treat dispenser is typically a rigid ball or shape that releases kibble as the dog rolls or nudges it. A puzzle feeder usually has sliding pieces, flaps, or compartments the dog must manipulate. Most owners on r/puppy101 recommend rotating between formats so the dog doesn't get bored.