I will be getting two budgies soon and have a question that I haven't seen asked before. Because of bird's complex respiratory system would it be okay to use alcohol-based makers, for example, Copic markers around them? The brand I have is low odor and labeled as non-toxic but I still often open up a window for extra ventilation. If I did open a window around the birds I would, of course, use a screen. Would it still be okay to use the markers?