Building and selling chicken coop like Carolina coop

[KansasKoops]

I have built 3 chicken coops that replicate the American Coop by Carolina Coop. I've had people ask me to build them one. Is it legal for me to build and sell if they look like the Carolina Coop?

 

[chicken1234]

I'd "think" as long as you aren't advertising them as Carolina coops, building them exactly from their plans