Thank you. Grass snakes can be bred but you can't take them from wild since they are protected by law and it can be extremely difficult to persuade wild caught Natrix natrix to take dead food such as frozen mice that are available commercially. However in the Netherlands keeping (or disturbing) the grass snake is forbidden, in Germany you can keep them when you have some kind of prove that it was born in captivity, in England, grass snakes are protected under the Wildlife and Countryside Act 1981 and cannot be harmed or traded without a licence, although they may legally be captured and kept in captivity. I sincerely don't know for Romania, in Italy, where i live, it is forbidden to keep/catch wild individuals, if you find a grass snake you have to let it where it belongs or release it if you decide to keep as pet because you break law.