OK you don't like sheep, so I Googled cows and found they graze 6 - 11 hours a day and spend much of the other time resting. They eat 60+Kg of grass per day and you aren't going to get 60Kg of blades of grass quickly. Nor are they going to cross continents anytime soon. The BBC fact file on Giraffes says "Giraffes spend most of their time eating, feeding between 16 to 20 hours a day."
Can I suggest that if you want to support the claim, you offer some actual reasoning and evidence - there should be some diaries of native Americans and how they ran so many hours a day they coverd several marathons every day, and about how many mountains of knives they amassed working 15 hours a day knife making, and so on.
Can I suggest that if you want to support the claim, you offer some actual reasoning and evidence - there should be some diaries of native Americans and how they ran so many hours a day they coverd several marathons every day, and about how many mountains of knives they amassed working 15 hours a day knife making, and so on.