Doggie blood donors

Veterinary care manager Kim Koelbel, right, and blood bank assistant Tina Estes, draw blood from Louie the dog, a regular blood donor at the University of Florida Small Animal Hospital, at the hospital's blood bank in Gainesville, Fla., Aug. 21, 2013.

Fresh frozen plasma from dog donors is stored in the blood bank at the University of Florida Small Animal Hospital in Gainesville.

Veterinary care manager Kim Koelbel weighs donated blood drawn from Louie the dog, a regular blood donor at the University of Florida Small Animal Hospital.

Louie, a regular blood donor dog at the University of Florida Small Animal Hospital, sneaks back into the treatment room to look through the window into the cat donor room at the hospital's blood bank in Gainesville.

Junior veterinary student Lindsey DeFalco, left, helps veterinary care manager Keri Bentley, right, draw blood from Daisy in the oncology treatment facility at the Small Animal Hospital at the University of Florida in Gainesville.

Veterinary care manager Kim Koelbel stores donated blood from a dog, Louie, a regular blood donor at the University of Florida Small Animal Hospital, at the hospital's blood bank in Gainesville.

Louie, a regular blood donor dog at the University of Florida Small Animal Hospital, peeks through the window into the cat donor room at the hospital's blood bank in Gainesville.