1.
Ohio Bird Sanctuary
2.
Ojai Raptor Center
3.
Oklahoma Westie Rescue
4.
Old Dog Haven
5.
Ontario Swine Improvement
6.
Operation Kindness
7.
Oregon Right To Life Education
8.
Ottawa Humane Society
9.
Ozarks Kat and K9 Shelter
10.
Paws and Stripes
11.
Pawsome Partners
12.
PDSA