A class of proteins known as toll-like receptors are the guard dogs of the immune system, sniffing out bacteria or viruses then rousing the rest of the immune system for attack. Because of their ability to activate the body’s defenses, toll-like receptors are a darling of drug developers. New research led by Brown University immunologist Wen-Ming Chu, M.D., identifies what protein alerts toll-like receptor 9, one of the most powerful guard dogs in the pack.

New SeeMyPetCam.com and PetCam Allow Owners to Video and Watch. Their Pets from PCs, Mobile Phones.

Dog owners need to take precautions to keep their pets from suffering heat-related illnesses and dangers this summer, according to an Auburn University veterinary professor.

A baby chihuahua (puppy) born in Japan with a heart-shaped pattern on his coat becomes a national idol - almost like the Japanese version of Knut.

The ugliness of Elwood has won him some acclaim and has made Elwood the ugliest dog of the world.

Researchers study dog DNA by isolating a single gene common to all small dogs which is expected to give clues to diverse sizes of dog breeds.

A team of three out-of-work stem cell biologists announced Monday that, after four weeks of rigorous observation and field testing, the evidence conclusively shows that chief researcher Dr. Henry Rogers' dog Franklin likes beer.

From the smallest Chihuahua to the largest Great Dane, dogs dramatically vary in size, much more than most other animals. Now scientists have discovered a genetic basis for this diversity. The reason different dog breeds have so many sizes may be explained by the new researche based on 3,200 dog DNA samples.