I bought 2 garter snakes, 1 male and 1 female, (Thamnophis sirtalis tetrataenia) about 2 months ago from a reptile exhibition. I have kept them together in a terrarium and have been feeding them frozen anchovies and occasionally live fish. I have been also giving them B2 vitamin/Riboflavin as I was told to do from the man I bought them. For the past couple of days the female has been in a very bad shape with minimized movement. I thought that her condition may be caused from the environment she was living in (maybe due to excess humidity) so I moved them both into another terrarium. Right now she is lying on the floor of the container with her mouth open and frequent convulsions across her body (maybe due to faster than the normal breathing).The other one seems just fine and he is right now curled up on a branch and looks perfectly healthy. I don't think the female has a lot of time left but could please someone give me some advice? Or if you have similar experience could you share it with me please? Thanks a lot guys!