Why should humans have all the fun?
For a male dog use a plainer yarn instead of the eyelash.

Instructions are given for pull-on and an open-fronted versions.

MATERIALS
50 (70, 100, 300, 400) g chunky yarn
25 (40, 50, 100, 300) g DK or chunky eyelash yarn
pair 6 mm (US 10) needles
quick release clips - 1 for the pull-on version, 2 for open fronted version
2 row markers
row counter

SIZE
to fit: toy (small, medium, large, x-large) dogs
width of back: 8 (10, 14, 18, 26)“
back length: 8 (12, 16, 20, 24)”
back length easily adjustable