aww poor dude Good to know, thanks.
That was was on my short list (you are not the only one that recommended it) BUT they have no longer have any Canadian vendors. I'd have to order from the US (with exchange and shipping it adds up).
I am more or less down to two options, or one once I factor cost. I may be ordering this one (there is a canadian vendor I have found though need to decide fast while they still have his size...):
Saratoga Horseworks Custom Horse Clothing Made in USA - K9 Kooling Coat
This one was under great consideration but it si TWICE the price. Some mentioned they have had one years so it lasts a long time but this isn't really a purchase that I will need for more than one summer. maybe two. 403 Forbidden
We've been using the old version of the Swamp Cooler (as best I can tell anyway, it's a RuffGear cooling vest). hard to say how much it helps (we're probably adding minutes at best but hey, it gets him out to pee). He does seem to do better when I wet the back of his neck/top of head so I'm going to see what I can do there. Maybe a bandana. Also looking to see if I can sorta fashion ice packs to his belly or his neck in a DYI less expensive fashion