Cooper and Otis

Cooper is a blood donor cat through the NorthStar VETS Blood Bank for Dogs and Cats

Cooper is a blood donor cat through the NorthStar VETS Blood Bank for Dogs and Cats

Otis needed a blood transfusion and came to NorthStar VETS. Dr. Kimberly Hammer of the Internal Medicine team and head of the NorthStar VETS blood bank, brought in her own cat, Cooper to help. Cooper is a British Shorthair, and has the less common Type B blood that was needed to successfully treat Otis. After Cooper made his contribution, it was given to Otis, who is now back home happy and healthy. His cat-mom sent this lovely letter to Cooper thanking him for his kind act. The NorthStar VETS Blood Bank for Dogs and Cats helps many patients throughout the year.


See if your pet is eligible to become a blood donor at NorthStar VETS.

Kimberly Hammer, DVM, DACVIMKimberly Hammer, DVM, DACVIM
Dr. Hammer received her veterinary degree from the University of Pennsylvania School of Veterinary Medicine in 2000. She spent a year at Mississippi State University College of Veterinary Medicine for a small animal internship and returned to the University of Pennsylvania for a two-year residency in small animal internal medicine. She earned board certification from the American College of Veterinary Internal Medicine in 2004. She has a special interest in interventional radiology/endoscopy and minimally invasive procedures. Her other interests include endocrinology, gastroenterology and hematology. She currently serves as the medical adviser for the NorthStar VETS blood bank. She joined the NorthStar VETS team in September 2007.

Outside of work she enjoys hiking, mountain biking, going to music concerts and reading.

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