Discussions about this loophole have been happening for much longer than I’ve been lively on fedi, but every technical dialog I’ve seen about this on Mastodon quickly reaches such an extreme level of “No, that’s all incorrect, it relies on how each server is configured and which implementations are in play in the following fifty-two methods,” that I’m not going to try a technical summary here.
Your French Bulldog vet will be able to prescribe the appropriate treatment primarily based on what has brought on your canine's ear to develop into contaminated.