An unnamed diabetic man is in serious condition after his dog ate part of his apparently infected foot while he slept.

The 61-year-old man, who had no feeling in his feet because of his condition, woke up on his couch with part of his foot — including three toes — missing. Veterinarians say the dog doesn’t need to be put down, as its instinctual for them to eat dead and infected tissue as a way to prevent a larger infection.

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Just last August, a Michigan man’s terrier ate his infected toe while he was passed out, saving his life and leading to the discovery that the man is diabetic.

Watch the video from the Associated Press below.

[Photo via Jason Crane, Creative Commons licensed]