I am not one of *those* people

...but I cant have him being cold all the dang time, either.

Using one of Sprout's old sweaters (18mth?) I trimmed it down to fit Jazz.
I cut the arms a good few inches and tapered them. (I turned the sweater for the design to fall on his back - so he is basically wearing it backwards).
I cut the sweater to fit halfway up his tummy (so, it doesn't get in the way of his 'business'). I also added a little extra piece (using the scraps) to add under the neck.

*I should have taken step-by-step pictures, but since I was winging it...