CBD gummies work fine for dog anxiety. I also have friends that swear by low dose ∆9 gummies turning their "hospice" dogs into puppies again, at least giving them some quality of life in the last days/weeks/months.
That said, I tried to research the recycling effect mentioned in the article and was disappointed to see first that there were no actual links to the listed sources, and second, upon searching for the articles I found that they are all blog posts. I couldn't find a single peer reviewed paper on the effect that is supposed to be so dangerous.