system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 Do cats and dogs catch colds? If so, why don't they ever seem to have the same kind of symptoms we do?
gpt
the symptoms of an illness is not the bacteria/virus destroying your body but your body fighting back. 

humans show this fight very clearly because we want others (our group/tribe/family) to know that we are weak and need help.

animals can't rely on help from others so their body fights in less obvious ways. the cat (a wild cat) still has to give 100 % to catch the mouse.