Dogs have weird bodies, yet we try to design sweaters for them that are based on sweaters for four-leggeds. And every dog body is different, so patterns invariably don't quite work. In these parts, it does get cold occasionally (although lately at unseemly times, like NOW), so those of us with short-haired dogs persist.
Pattern: Big Penny Sweater, by Corrinne Niessner.
Yarn: Lion Brand Wool-Ease Chunky, in "Denim"
Modifications: see below
Watson is a medium-sized dog, but the medium fleece jacket I bought for him, while long enough, does not go around him very completely, as he has a deep chest. So I knew I would have to make at least some modifications to the pattern. I started by mixing and matching the stitch counts for both sizes in the pattern, going for the smaller number for length and the larger for girth.
And yet I still had to add inches to the girth while extending the back and also ending the main part of the body soon enough so that he doesn't pee on it. I didn't seam the top inch or so, as it is too bulky with his collars. My plan to reinforce the leg holes also had to be abandoned, as the holes are a bit snug and misaligned.
At some point I will probably custom design a sweater for him, but since winter is almost over (DESPITE THE SNOW FALLING FROM THE SKY TODAY), I will postpone that project.