Food Seeking

Food seeking combines sight, smell, and hearing, which are largely evolutionary adaptations to improve survival. All senses are generally employed, but each animal may be more dependent on one than on the others. Pigs are heavily dependent on olfactory acuity but visually weak, whereas fowl are to the converse. The subterranean location of predominant food likely predisposed the pig to a keen sense of smell, whereas feedstuffs at diverse locations above ground probably led fowl to have extraordinary visual capacity. Farm mammals have extensive nasal scrolling that is well endowed with olfactory sensitivity compared to a severe limitation in both respects with fowl. Mammals also have the ability to generate a bucopharangeal seal and ''sniff,'' thereby accentuating olfactory acuity, whereas fowl do not.

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