MATH PUZZLE: Can you replace...

A little boy comes down for breakfast and his mother asks if he had done his chores. “Not yet,” says the little boy.
His mother tells him that until he completes them, he won't be getting any breakfast.
Well, he's a little angry, so he goes to feed the chickens and kicks one. He goes to feed the cows, and kicks a cow as well. He goes to feed the pigs, and he kicks a pig.
He goes back in for breakfast and his mother gives him a bowl of dry cereal. “How come I don't get any eggs and bacon? Why don't I have any milk in my cereal?” he asks.
“Well,” his mother says, “I saw you kick a chicken, so you don't get any eggs for a week. I saw you kick the pig, so you don't get any bacon for a week either. I also saw you kick the cow, so for a week you aren't getting any milk.”
Just then, his father comes down for breakfast and kicks the cat half way across the kitchen.
The little boy looks up at his mother with a smile and says, “Are you going to tell him, or shall I?”