My 55 lbs pointer goes on the majority of my trips with me! I have two sleep systems:

For overnight lows above 40F I have a MYOG dog quilt with a 10d outer and apex inner. It’s effectively a synthetic version of the Groundbird Gear Turtle Top Quilt. It’s light, cheap, and easily repairable. I don’t think this is an effective setup as lower temps as it requires a lot of fiddling.

Below 40F, I have a Nunatak Dog Bivy. Love this thing, Nunatak consistently puts out best in class gear and this is no exception. I’m pretty sure Jan’s dog Skotti is also a McNab!

As for pads, I basically always use a CCF pad that doubles as my sit pad during the day. I’ve dabbled with cutting down inflatables but haven’t had success yet. I think a wide, cut down, self-inflating pad may be the eventual end point.

BPL discussed it a little bit here. Your mileage may vary, I didn’t see any long term reports and Ultra is a very weird fabric when it comes to adhesives.

It’s not really critical though. You should still use a pack liner with fully sealed packs. High stress seams, such as shoulder straps, will still allow water in. Pack liners allow you to access the interior of the pack during active precipitation. Eventual Ultra delamination will kill the waterproofness regardless.

Signed an MYOG enthusiast!