This page uses data from the Miitopia Param Info spreadsheet, compiled by PibPasquale, Kobazco, and UglyFrenchFry.
The Doggy Doughnut ★ is a dome-shaped, tan doughnut with no hole in the middle and a caramelized top. It appears to have a Woof-o'-the-Wisp face, complete with bobbed ears. It is placed in a blue bowl. Strangely, this Grub along with its other rankings does not seem to have any colors based on the enemy that most commonly drops it, unlike most other Grub.