How many chickens does it take to kill an elephant?

I don't think any number of chickens would come together to kill an elephant, but if you really wanted to take a guess, you'd have to find the mass of an average elephant and then find the mass of the average chicken. Doing this, you'd probably end up with about 6500 chickens.

150

Explanation:

You make the elephant eat them the it explodes ... You will have to force it to eat them because they don't eat meat