Companion Animals
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what was the first animal to be domesticated and when?
the dog, 12-10,000 years ago
where did dogs come from?
wolves, all around the world, like Asia, Europe, Arabia, China
what are the 2 theories on dog domestication?
• self- domestication 2. human involvement
how were dogs actually domesticated?
mix of both theories
describe the Russian silver fox experiment?
these foxes were bred in captivity for 40 years and selected for temperament, the nicer ones became more like the dogs we know
female dog
bitch
male dog
dog
mother of litter
dam
father of litter
sire
young dogs
puppies
parturition
whelping
how many unofficial dog breeds are there?
350-400
how many dog breeds are recognized by the American Kennel Club?
193
how are routine expenses for dogs trending in recent years?
getting more expensive
how many owned dogs are spayed or neutered?
85%
how many owned dogs were adopted from an animal shelter?
22%
what is one (not great) solution to the problem of unadopted dogs?
dog meat, pretty fatty and high in iron, consumed in China, Taiwan, Mexico, and America (Native America)
how do dogs cones and rods compare to humans?
cones: horizontal slit, spread out and lower numbers rods: more than humans so they see fewer colors, but better in low light
what 2 wavelengths of light do dogs see?
dichromic: blue and red, which looks yellow
what is the tapetum?
kind of like a mirror behind the retina, amplifies light, not all dogs have it
how many diopters do dogs have and what does that mean?
1-2, near sighted
what is visual acuity in dogs?
focus and clarity is not great in dogs
what is dog’s flicker fusion?
75 hz
how do seeing eye dogs work?
smellavision