I would appreciate advice on a ringworm concern. I usually leave my cat with family when I travel for more than a few days. He is used to them and their house and seems to prefer it to being alone at home and checked on twice a day. We were planning to take him there over the holidays, buy they have recently adopted cats who may or may not have ringworm. They don't have a firm diagnosis yet. Assuming that they test negative, is there still risk involved with taking our cat to their house? Making other arrangements would entail significant changes to our plans (complicated and made months ago), but I don't want to take any big risks.