[Marty M]

To those unaware, as I was, while both substances are antifreeze- propylene glycol is considered safe to pets and is a realtive of ethylene glycol which is pure poison for humans and pets (lost a cat to it many years ago, not pretty, neighbors were unaware). Still it,PG, is an approved additive for dog foods, but not cat food by the FDA. It’s also used in a lot of human foods. Yuck