I am having the worst trouble with flies in and around my torts enclosure! Is this normal? There used to just be a few but it seems like their little population exploded and I'm noticing my tort (Bowser) chasing them around like they're stressing her out. Because I live in Alberta, Canada I have an indoor enclosure but I have a couple friends with similar ones and they don't seem to have the same problem with flies as I do. Any suggestions?