I saw a rather cringey article that was shared via msn.com from “rumble”. It was about a beagle, in which the writer described as sneaky and smart, detailing a family’s coffee cup mysteriously disappearing; turns out the beagle is sneaking away the coffee. The article fails to mention that coffee is not safe for dogs, due to both the caffeine and small amounts of theobromine.
Caffeine by itself isn’t toxic to dogs or cats, but they are very sensitive to small amounts. Also, coffee is usually accompanied with dairy (cream or milk); adult cats and dogs cannot digest lactose, so it can cause indigestion or bloating.