I've spent the last few months looking for houses in York County and I can say if you''re looking to keep chickens you're actually better off getting property in town than out in the country because city ordinances take precedence and the county ordinances regarding chickens are funky beyond belief!
As I understand it only certain zoning can have chickens and it's much more limiting that other livestock; although you can have horses, sheep, pigs even cattle on less land, in order to have poultry your property must be at least five acres in size! Worse, enforcement is spotty at best so while you might be able to get away with it it's a crap shoot at best. There are movements about to change this (at least for "pet" poultry) but to my knowledge nothing is set in ink yet.
If I can find the online .pdf file again I'll post a link here.
I'm not sure about Lesslie (isn't that Lancaster Co?), but Rock Hill allows pet chickens (no roosters) limited to four, and they must be "kept" no closer than 35 feet from any human domicile. In Clover, where I'm moving, it's also four (again no Roos) but the property must be at least 10,000 feet in total area (a smidge less than 1/4 acre). York I believe prohibits chickens altogether within city limits as does Fort Mill.
