I'll just add this in case the testing doesnt give you answers.
Anorexia exits. Although nearly ALL cases of dogs who do not want food has an underlying medical cause.
But some dogs simply have anorexia. There are drugs that work very good for it..At one point they stopped making one type so we had so we had to switch. They increased Sayblees aggression. So from then on i handfed her.
https://vcahospitals.com/know-your-pet/anorexia-in-dogs
actually there was a discussion on the Clean Run groups about cooling coats. I know CR sell several different types and CR is very good about testing what they sell.
+1.
I've heard a few people I know have trouble with the spray. I bought the gel originally and while the kids don't love it, they tolerate it just fine. I'll stick with the gel - I've used it successfully for almost a year now.