Today Dozer has his 3rd set of puppy vaccines. Is there anything I should be talking to the vet about? I have a couple things on my list (ear cleaner, advantage multi vs. revolution, neutering - I'm not sure what age they recommend ... I have my own ideas about when to do it, but would like to know where they stand). Is there anything else important I need to be discussing at this point in time? He's 16 weeks old.