Q: My elderly cat’s pupils seem to stay dilated, even in bright light. Why? A: In old cats, dilated pupils are often just a sign of a harmless condition called iris atrophy. However, if your cat has ...

A video of a cat's pupils dilating at the sight of its favorite toy, going from cute to killer mode, has delighted the internet with over 6.5 million views. In the footage, Luna the long-haired black ...