Trainer Terry Simons' dog Reveille battles canine lymphoma, inspiring Simons to start CLEAR (Canine Lymphoma Education Awareness and Research).
The nonprofit American Society for the Prevention of Cruelty to Animals is organized in New York City.
The first veterinary college is established in Lyon, France, by Claude Bourgelat.
The archaeological record suggests that dogs and humans were first buried together about 14,700 years ago.
Modern studies suggest that the modern dog diverged from its wolf ancestral line about 27,000 years ago.
