When a cat is sick, it may look a little sad.

And that’s because its not a cat at all.

But it can be an environmental hazard, too.

A study of more than 6,000 cats in California, which also included cats from the U.S., found that many had problems with the chemicals that can be harmful to humans.

And the study found that the cat that had the most exposure to the toxic chemicals was the one that was most likely to be sick.

We have a pretty good idea of what’s in cats’ environment and what they’re exposed to and how that impacts their health and their lives, said Dr. Brian Smith, a veterinarian and director of the California Veterinary Medical Center at the University of California, Davis.

“It is our job to be proactive about addressing the health of these animals.”

The study also found that some cats are more likely to become sick than others.

Cats that are exposed to heavy metals in the environment were at increased risk of developing health problems.

And some cats that were born with a genetic predisposition to developing lung and heart problems were also more likely than others to develop those problems.

Cats are the primary food source for wildlife, and many animals rely on them for food.

And many species of cats are protected by laws.

They also have a very low mortality rate, which is a factor in their success in providing for their cats.

So what are the risks to a cat?

A study from the University