Foals kneel down on all fours when they sleep. Sometimes you might see a dog do it as well.
An elephant - it's the only animal with four knees, and thus the only one able to kneel on all fours.
camels
elephant
The receiving guy kneel on all fours, while the 'top' goes in from behind.
animals because they walk on all fours and need more support animals because they walk on all fours and need more support
because their animals
It means that you get down on your hands and knees, and stand like a four legged animal, 'on all fours'.
A quadraped.
get down on all fours and have people move balls all over your back.
Birds and humans..otherwise, all other animals walk on all fours or have to hop on two feet, not walk. Kangaroos and wallabies walk on all fours and hop on two, so there's a big difference there.
Not all animals walk on all fours. Humans are animals too! Those animals that do walk an all fours do so because it is an efficient and stable means of movement. The earliest land creatures were fish or frog like and "crawled" along the ground. Later on animals evolved that larger and more powerful legs. Animals like cheetahs can run very fast on four legs. The ancestors of human beings walked mainly on all fours - like modern gorillas and chimpanzees do. We're not sure exactly why human beings evolved to walk on two legs, but it has caused back problems for human beings because we have inherited a spine that was originally designed for four-legged creatures.
it means 3 fours
on all fours = crawling around on hands and knees.
To move "on all fours" would be to crawl on your hands on knees.
The Family That Walks On All Fours was created on 2006-03-17.