91色情片

PIGS may be able to tell people apart by their faces. Hajime Tanida of
Hiroshima University in Japan trained pigs to approach a person wearing
overalls, gloves and boots by rewarding them with food. Individual pigs were
then given the choice of approaching the feeder or an identically dressed
person, when both sat behind waist-level screens. Even if the researchers鈥�
scents were masked with perfume, or they partially hid their faces, the pigs
still approached the original feeder (Applied Animal Behaviour Science, vol 73,
p 45). 鈥淰isual cues are very important for them,鈥� says Tanida. 鈥淭hey are smart
and sensitive animals.鈥�