The Nature and Development of Animal Intelligence

20th day advance animal intelligence appear attempt beak Bedlington terriers behaviour bird birth brain cataplexy causes cavy cerebral cortex cerebrum chick Chickaree Chipmunk Comparative Psychology condition cortex creature dachshund diary doubt drink early ears environment especially evidence existence experience eyes fact feet feigning finger fore-limb growling habits head hearing heredity hibernation human inches individual instinct interesting investigations kennel kitten later licks Lloyd Morgan lower animals manifests mature dog meat ment mental milk mind mongrel mother mouth move movements nature nervous nest nose notes noticed observations paper paws peck perfect period physical physiological pigeon placed play Prof psychic development puppies pure-bred dogs rabbit recognise Red Squirrel referred reflex action regard result rodents scratching seems sense Skye terrier sleep smell soon sound St Bernard sucking tail taste terrier to-day touched walks young animals