Pup treats are scattered all throughout the levels. Pup treats are found either by themselves worth 1 pup treat, in a bag worth 3 pup treats, or by interacting with certain obstacles in the level by pressing
with the appropriate character.
There are a total of 7250 pup treats to collect.
Locating all the pup treats in the main mission section of the game will net you 3250 pup treats. The remainder can be obtained by playing through all the various mini games located in the extras menu.