Hi all, my husband took my 18 weeks old boy to the vet today to check on the scab he has on his belly since it hasn't heal after 7 days of antibiotics. The vet took some sample to test and while they were there, the vet also suggested him to get another round of DHPP, so husband agreed and did it as he isn't very up-to-date on the puppy's vaccination record. And now i'm very scared cause he already had 3 sets of DHPP! And today they gave him a 4th one! He had one when he was 9 weeks old at the breeder's vet and the 2nd set at my vet at 12 weeks old and 3rd set at this same vet at 15 weeks. I'm very upset and scared, is there anything I should be watching for now? Would this 4th set hurt him in any way?