Hi, all our cats have been sick with a cough and sneezing and plugged up head, not all at the same time, one cat gets it then gets better than another till they all had it. Now its starting all over again, How do I stop this stuff from going around and around to all of our cats? I think when I got Tuffy he must have started the whole cycle of them getting sick. I asked the vet if there was any vaccination [sp?] for this stuff and she said not really.