Eight feet of cow

One day, Windu and Paijo are sitting under the shady tree at the edge of rice fields. They see the scenery of paddy field complete with a beautiful golden rice, farmers and background mountains. The idea emerged from Windu to fill their leisure time with tic-guess.
Windu: Jo, playing tic-guess ahead!
Paijo: Okay.
Windu: Can you see the cow in farm there. How many cow feet?
Paijo: Oh ... It's easy. Of course four!
Windu: Really, Jo?
Paijo: I'm sure.
Windu: False. The correct answer is EIGHT . Try to count it again!
Paijo: Everyone knew the cow had four feet. Two in front, two in the rear.
Windu: Try to count slowly. Foreleg, how many there are?
Paijo: Two.
Windu: the back leg?
Paijo: Two.
Windu: If that right leg?
Paijo: Two also.
Windu: How about the left one?
Paijo: Of course two.
Windu: Two in front, two in the back, two on the right, and two on left. Then how many?
Paijo: Eight.
Windu: You're right now ... EIGHT!