Demi Lovato's puppy was ripped to pieces by a coyote.

Demi revealed yesterday that her puppy, Buddy, died on Sunday in a "tragic accident."

TMZ has learned that the cause of death was a coyote attack that "ripped" the dog to pieces. The coyote wandered into the backyard of Demi's house in LA and killed the puppy there.

Demi was the one who found Buddy dead.

She got the puppy last December.