One dog per yard
Each row, column, and colour holds one dog. The rest of the blanket is ruled out with a mark.

Dogdoku is Catdoku's backyard twin. One dog in every row, column, and colour. They keep off each other's fence line.
Same rules. Different yard. A daily board, and packs that get meaner.
Play it here, or open Doku if you want all three animals in one place.
Each row, column, and colour holds one dog. The rest of the blanket is ruled out with a mark.
Dogs cannot sit next to each other, even at a corner. The board is tight on purpose.
The same board for everyone today. Packs from a first 4×4 up to a late 8×8.
Progress stays on the device. No account, no timer, no energy.