I was checking my almost 5 month old puppy's teeth and I noticed his left bottom premolar, closest to the big molars is super loose and wiggly. It also looks a bit bloody and red around the tooth. I checked the other bottom premolar on his right side and that one is not wiggly at all. I am not sure if it is a puppy premolar tooth or an adult premolar tooth but I am so worried that it might be an adult tooth. What should I do? He also currently does not have any canines yet, but I can tell he is going to loose them soon because it is getting wiggly.