Sheep skin

Has anyone ever used sheepskin with their baby? I've done my research on it and I think I'm going to use one with my next baby. We have good ventilation in our room and I plan on cosleeping with our next baby. I say we have good ventilation because one of the reasons they say we should not use them is because of chemicals that can make the baby stop breathing but if the air is constantly circulating I don't think that should be a problem. I plan on buying one that is not made with chemicals so that should help also.