You don't, because cows don't have phones.
Rex (made this one up myself!)
Follow the slime trail.
Where are the udders? (Thanks to my three boys for that one!)
Because their horns don't work 8 year old brother just told me this joke, thought it belonged here
Fred: No one important. Just some man who said it was long distance from Australia so I told him I knew that already and put the phone down!
They all have phones.
