Before you get more I recommend thinking about what you will do with the hens when their production slows down. If you plan to sell them or eat them, then your limit should be based on what you can care for, house securely and keep clean, etc. But if you plan to retire them and continue to care for them as I do, then don't add too soon or all your girls will slow down production at the same time. For 2 people you could add ~2-3 chickens every 2-3 years and hope natural mortality keeps your numbers to something reasonable. BTW this practice is NOT recommended from those who wisely advise you to avoid the stress of introducing new chickens to your flock (stressful to humans and chickens alike as there can be fighting), and the possibility of introducing diseases. This and obvious economic reasons involved with feeding chickens that don't lay often are why most people sell or eat their chickens when they reach ~ 2years old and then get new ones. These are very real concerns and I share them but since I don't want to kill my girls I do my best to minimize my risks.
I now have 3 retired girls (about 3 eggs / week from them) and 4 in full production -too many eggs for the 2 of us but we share with neighbors for putting up with some squawking. Getting the 4 new ones at once was a mistake - I should have gotten 2, but you know, chicken math and all (well 1 might die and 1 might be a rooster so if I want 2 hens then I should get 4 chicks!). So I now have 7 chickens and the coop and run is plenty big for them, but for me the poop / food / overall care is a bit much with 7 and wish my math had been better and had stuck with 5. I also wonder what I'll do when these 4 start slowing down and want to get new ones....time to move, I guess!
I now have 3 retired girls (about 3 eggs / week from them) and 4 in full production -too many eggs for the 2 of us but we share with neighbors for putting up with some squawking. Getting the 4 new ones at once was a mistake - I should have gotten 2, but you know, chicken math and all (well 1 might die and 1 might be a rooster so if I want 2 hens then I should get 4 chicks!). So I now have 7 chickens and the coop and run is plenty big for them, but for me the poop / food / overall care is a bit much with 7 and wish my math had been better and had stuck with 5. I also wonder what I'll do when these 4 start slowing down and want to get new ones....time to move, I guess!