Thinking it through
I have kept a few chickens in a previous life, they are subject to a fair number of diseases that will kill them in 24-48 hours and will spread like wildfire through a flock and everything with teeth and an appetite wants to catch and eat them, especially the chicks, rats will take a chick if they can, the chicks are so stupid they can drown themselves if the water you give them is more than 1/8" deep, so they are not that easy to keep.
But the cruncher is $5 a throw! Where in poverty stricken Sub-Saharan Africa are the people who are willing to pay five bucks for a chicken that killed and dressed in a supermarket costs about €3?
I know he's thinking about the buyer getting a layer to provide eggs for 1-3 years before it declines as an egg producer but a quick Google tells me that the average income in Eastern and Southern Africa is UP to $400 a year! $5 That's the equivalent of a 30 grand a yearworker coughing up $375 as a proportional part of their wage.
If he is going to give away chickens, set up an education service and possibly finance someone like http://vetswithoutborders.net/.