pica.

my dog has major PICA. according to me, it stands for:
Persistent
Ingestion of
Caustic
Additives

She eats anything and everything, especially distasteful inedibles such as poop, straw, paper, grass, string, clothing, fur, parts of her toys, hair, and a combo of these things. It's gross. No wonder she's got G-I problems. It's actually a common behavior you see in people with mental retardation, pervasive developmental disorders, schizophrenia, or neurological disorders. Or you see it in dogs.

ew.