Editing Guinea pig (section)

==== Social behaviors ====
If handled correctly early in life, guinea pigs become amenable to being picked up and carried and seldom bite or scratch.<ref name=harkness/> They are timid explorers who often hesitate to escape their cage even when an opportunity presents itself.{{sfn|Vanderlip|2003|p=20}} Still, they show considerable curiosity when allowed to walk freely, especially in familiar and safe terrain. Guinea pigs that become familiar with their owner will whistle on the owner's approach; they will also learn to whistle in response to the rustling of plastic bags or the opening of refrigerator doors, where their food is most commonly stored.