Webkinz is a virtual world and digital pet website where users can adopt, care for, and play with virtual pets. There is no physical food or items associated with the game that can be found on a computer or in a dock.
How did I get a webkinz jungle sandwich in my dock?
There is no such thing as a "webkinz jungle sandwich" or any Webkinz food item that manifests as a computer file that can be stored in a dock.