An diabetic Oregon man is in serious condition after his dog ate part of his right foot, including three toes.

The 61-year-old man, who has no feeling in his feet, told emergency responders that he fell asleep on the couch and woke up to find pieces of his foot missing.

Veterinarian Alan Ross says that the dog may have been trying to rid his owner of dead tissue, and says he may have been attracted to the foot if it were infected or gangrenous.

Ross says the dog doesn't need corrective action because it wasn't "acting out of meanness."

People with diabetes can develop several issues with their feet. These problems most often occur when there is nerve damage, also called neuropathy, which results in the loss of feeling in your feet, the American Diabetes Association said on its website.

Click here for more information from the ADA.

The Associated Press contributed to this report.