Don't give a dog chocolate! Chocolate affects a dog's heart and nervous system; a few ounces are enough to kill a small dog. See more

There is a species of bird, Antpitta avis canis Ridgley, that barks like a dog. See more

Heroin used to be a cough medicine for children. A German company (Bayer) registered heroin as a trademark. See more

The sentence "the quick brown fox jumps over the lazy dog" uses every letter in the English language. See more