1. Will put anything in their mouths and start chowing down, no matter how inedible or distasteful the item
  2. Cannot be left alone (unless caged in a crate or crib)
  3. Do not necessarily sleep through the night
  4. Emit high pitched squeals and yelps
  5. The drool
  6. The poop & pee: unexpected and often uncontainable
  7. Beg for food by standing at the feet of whomever is eating anything
  8. Sorrowful, "feed me love me hold me" eyes
  9. Zero embarrassment about behavior