The following puppies in these pictures may be cute, but don’t be fooled, these dogs are on a serious mission. The top jobs for dogs are police dogs, military dogs, fire dogs, guide and hearing dogs, medical assistance and disability dogs, and therapy dogs. The most common breeds for working dogs are Retrievers and German Shepherds, as they’re well known for being smart and very easy to train.

A dog’s nose is 50 times more sensitive than a human’s, which makes them extremely useful in police and fire departments. Police dogs sniff out drugs, detect explosives, and find missing people or objects using their nose. Likewise, firefighter dogs detect ignitable substances and find the cause of a fire, especially in cases of arson.

The vests that they wear is not just a cute outfit – it’s their uniform. It informs us that these dogs are on the job. Remember – despite the urge to reach to them, you should not pet, feed or talk to these dogs when they’re on duty. They’re doing a very serious job that we should all acknowledge and appreciate.

Below are some adorable pictures of cute puppies during their first days at work. These pictures will definitely brighten your day.