Whether it's that look in their eye or the fact you've denied them treats for the fifth time, most owners have suspected their cat of harboring murderous intentions at one time or another. Like humans ...

Purring is something that pretty much every single cat does, but interestingly we know less about why cats make this noise ...

Most cats have unique personalities and quirks — like eating grass or being picky about their food. Sudden behavior changes, like hiding in the litter box or refusing to use it, could suggest stress.