Myths about pets are as common as Elvis sightings. Mythical dogs pass pinworms to children and can’t see color. Mythical cats can see in the dark and always land on their feet uninjured. None of these myths are true … and some are downright dangerous.

The fact is, kids get pinworms from other kids. Dogs see some colors like blue and purple, but can’t separate red from green. The specialized retina and reflective lining of the feline eye helps cats see in dim light, but not total darkness. And cats that fall from heights can be injured, just like dogs and people.

Perhaps the most dangerous myth is that female dogs should have a litter before they’re spayed. This common legend increases both the risk of mammary cancer and the number of unwanted pups. So if you want to separate facts from fancy, ask your veterinarian, the greatest myth buster of all.