How Many Backyard Chickens Should I Get? Does The Cost Of The Hen House Effect The Chicken Flock Size? Does The Cost Of Feed Effect The Chicken Flock Size? Does The Space Needed for Hens Affect The Chicken Flock Size? Does Choosing a Breed Of Hen Effect The Chicken Flock Size? At BackyardChickenNews, we help people who want to raise backyard chickens by collating information and news blended with our own personal experiences. If you want to have backyard chickens, you must first determine how much they will cost you. This includes the price of the hen house, the feed, and the space that you need for them. Once you know the costs, you can decide how many hens to get.