Dogs sometimes like to eat feces and this is known as coprophagy.
From the bostonherald.com
Egyptian vultures also engage in coprophagy, or dung-eating.
From the newscientist.com
Coprophagy is also practiced by some rodents, such as the capybara, guinea pig and related species.
From the en.wikipedia.org
Taboo acts such as incest, rape, coprophilia, coprophagy, bestiality, and murder are common themes.
From the en.wikipedia.org
Coprophagy apparently brings a whole host of benefits.
From the newscientist.com
It's called coprophagy, and a lot of dogs do it.
From the freep.com
More examples
Eating feces; in human a symptom of some kinds of insanity
Coprophagia /ku0252p.ru0259.u02C8feu026A.du0292i.u0259/ or coprophagy /ku0259u02C8pru0252fu0259du0292iu02D0/ is the consumption of feces. The word is derived from the Greek u03BAu03CCu03C0u03C1u03BFu03C2 copros, "feces" and u03C6u03B1u03B3u03B5u1FD6u03BD phagein, "to eat"...
The eating of feces
When animals eat their own feces, usually to complete digestion of food.
Animals eating their own feces - not particularly common - can get nutrients out of them a second time
The normal practice of the rabbit consuming some of the droppings (soft night feces) directly from the anus.