Bluebulb Projects' The Measure of Things presents:
100,000,000,000 is about five-and-a-half times the number of Chickens in the World.
In other words, the count of Chickens in the World is 0.190 times that amount.
(a.k.a. fowl) (Gallus gallus domesticus) (2011 figures) (average population)
The most numerous domesticated animals in the world, the estimated average population of chickens worldwide is 19 billion animals. Of these, about 6.4 billion birds produce the world's supply of chicken eggs.