The ancient Chinese believed that the 12 animal signs of the zodiac are divided by yin and yang into 2 categories. In addition, they thought that odd numbers belong to yang while even numbers belong to yin.
The number of toes on most animals is generally the same on all feet. However, the rat has 4 toes on its forefoot, and 5 on its back foot. Odd numbers with even numbers of toes on the same animal is rather rare. Hence the rat ranks first.
Zodiac Animal |
Toes per Limb |
Odd/Even |
Yin/Yang |
Rat |
4 front, 5 back |
even and odd |
yin and yang |
Ox |
4 |
Even |
yin |
Tiger |
5 |
Odd |
yang |
Rabbit |
4 |
Even |
yin |
Dragon |
5 |
Odd |
yang |
Snake |
0 |
Even |
yin |
Horse |
1 |
odd |
yang |
Goat |
4 |
even |
yin |
Monkey |
5 |
odd |
yang |
Rooster |
4 |
even |
yin |
Dog |
5 |
odd |
yang |
Pig |
4 |
even |
yin |
In total, there are 6 animals with odd numbers of toes, placing them in the yang category, and another 6 creatures with even numbers of toes, belonging to yin. |