PICS: 'ER's' animal antics: Animal guest stars
Human stars weren't the only ones who entered the doors of "ER" over its 15 years.
Animals may not have gotten their own director's chair or trailer (except for the horse), but they always stole the scene -- whether they were fuzzy, hoofed or even gilled.
Aww, right? Do you think the animals helped or hindered the stories? Will you miss 'ER'?