I have no experience with parasites at all but my gosh. Do you know if this vet is a bulldog vet? Not that there is anything wrong with a regular vet but bullies being so different, you may want to switch if this isnt a bully vet. I go to a regular vet for basic things since it is closer and easier but I go other places for the bigger things if needed. Hopefully somebody will be along with help. maybe @Davidh knows more about this.