Shaved completely??? Just for one tick? I hope when you lifted it off you did not leave the legs in -you should only get them off with proper tick removers or make sure they have been twisted out when you remove them. Ticks are not a sign of poor hygiene or anything like that, they can pick them up just walking along a grass verge. They fill with blood then drop off and do not cause the dogs any discomfort, although a heavy infestation can cause anaemia but this is very unusual. Frontline spray will kill them and stop them getting a grip in future.