Ecco l'elenco delle fonti, disponibile qui.
Eating:
http://well.blogs.nytimes.com/2010/04...
http://tails.co/requirements.html
http://healthyeating.sfgate.com/recom...
Sleeping:
http://www.petplace.com/dogs/sleep-be...
http://www.pawposse.com/how-much-do-d...
http://www.cdc.gov/features/sleep/
Vision:
http://www.philly.com/philly/blogs/ev...
http://thebark.com/content/what-color...
http://www.sciencedaily.com/releases/...
Speed:
http://en.wikipedia.org/wiki/Greyhound
http://bleacherreport.com/articles/12...
Teeth:
http://www.pawposse.com/how-many-teet...
http://pets.webmd.com/dogs/teeth-gums...
https://en.wikipedia.org/wiki/Human_t...
http://dogfacts.wordpress.com/2008/02...
Nose print:
http://www.buzzfeed.com/thepetcollect...
http://mentalflossr.tumblr.com/post/4...
Hearing:
http://www.whole-dog-journal.com/issu...
http://en.wikipedia.org/wiki/Hearing_...
http://en.wikipedia.org/wiki/Hearing_...
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