Jabruson / Silverback Western lowland gorilla eats soil for mineral content {Gorilla gorilla gorilla} Odzala NP, Democratic Republic of Congo.

Petra Wegner / British Shorthair Cat, golden-ticked tabby being given vitamin paste by a woman

Petra Wegner / British Shorthair Cat, golden-ticked tabby being given vitamin paste by a woman

Igor Shpilenok / Saiga {Saiga tatarica} lick ground for minerals, Cherniye Zemly Zapovednik, Russia.

Carol Walker / Mustang / Wild horse licking ground for mineral content, Montana, USA. Pryor

Richard Du Toit / Giraffe licking soil for minerals, Moremi WR, Botswana {Giraffa camelopardalis}

Jabruson / Mountain gorilla eating rock rich in minerals Virunga NP {Gorilla g beringei} Zaire / Congo