I need help... Need to know if I can give a very sick hen gasping for air (MG) an injection of Tylan 50 when I just started her on Denagard a few hours earlier. Keep in mind, her crop is sour and has not moved for a day at least, plus she did not drink so much of it yet... maybe about 2 table spoons total, though I doubt that much. She is struggling to breathe. I highly suspect it is MG. Is it ok to mix those two antibiotics? I thought since she has the sour crop and things are moving that maybe the denugard is not getting where it needs to go pronto! Wouldn't the shot get her something to fight it now? Or is this a totally bad idea? Please, if you know the answer, let me know sometime soon. I know time is off the essence. She had been strong and coping with this well but took a turn for the worse.