People have long enlisted the help of a dog’s nose to detect everything from bombs to bedbugs to contraband in prisons. Cadaver dogs are trained to locate decomposing human remains. Apollo, for example, was a fearless NYPD German shepherd and one of the … Link.

Pick a species: dog, skunk, camel, etc. Type the service your animal provides: Age-related dementia, speech impediment, facial tic, etc. There’s even a Cadaver Canine, which I assume travels with a corpse, because, you know, they need all kinds of support. Link.