Just used some the other day - worked fine. Old stock in store?
It must just be in some states that outlawed the old kinds of anti-freeze.
MI won’t allow the old kind of anti-freeze.
“Animal Friendly Antifreeze?Engine Ice Propylene Glycol Anti Freeze
Fortunately there are less toxic alternatives to ethylene glycol now on the market. The antifreeze containing propylene glycol is the safer alternative and is apparently less appealing (less tasty) to animals.”
http://www.arkanimals.com/propylene-glycol-anti-freeze-pet-safety/