How Many Didn't What?

Riddle: There were thirty cows in the field and twenty eight chickens how many didn't?

Answer: There were thirty cows and twenty of the cows ate chickens how many did not eat them. 10!

Source: https://www.riddles.com/9697

There were thirty cows in the field and twenty eight chickens how many didn't? — how many didn't what? by cody j s v1.

Riddle: There were thirty cows in the field and twenty eight chickens how many didn't? Answer: There were thirty cows and twenty of the cows ate chickens how many did not eat them. 10! — by cody j s v2.