Leptospirosis Of all the vaccines we offer her at Companion the one we are asked about the most is leptospirosis. The reason for this is due to leptospirosis vaccines not being considered a core vaccine for dogs like rabies, Bordetella, distemper, and parvo. This, unfortunately, leave far too many dogs unprotected from an illness that results in fatalities in 10-25% of the cases in which […]