Sniffers.
Bloodhounds are typically used as police dogs to sniff out drugs and such. But did you know that bloodhounds are able to trace scents that are even some 300 hours old? That’s impressive.
Here to Halp.
Ugh, so precious. There are also diabetic alert dogs who can signal to their human when they pick up on the very special scent which is released when their human’s insulin levels drop. Our heroes.