system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do humans get colds but our pets don't seem to? Why are cold-like symptoms in animals often an indicator of something serious, when for humans, colds are a mild annoyance at most?
gpt
Dogs and cats do get colds and have the same symptoms we do. They just tend to hide their illness when sick and nap a bit extra so you probably won’t notice. 

They may also catch colds less frequently because not all viruses that affect humans can affect dogs and cats. Since dogs and cats are seldom indoors with other large groups of animals, they have fewer disease vectors. 

But all animals get minor illnesses sometimes.