More recent: apparently, it is still not known if they get Lyme Disease. http://fhl.sonic-weasel.org/browse.php?msg=YG12126 BTW, if you search under words like "ticks" you will find a number of excellent vet posts on ways to prevent problems with them for your ferrets at http://fhl.sonic-weasel.org . [Posted in FML issue 4096]