system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why is it almost all animals can drink from lakes, ponds, etc, but humans must treat the water first?

My dog, deer, etc, drink out of a near by pond with no repercussions but any human would run the risk of dysentery drinking out of the same source.
gpt
Humans can, actually. But they have to do it since birth and keep doing it.

Humans are born with a remarkable amount of strong gut bacteria, that allows them to do things like eat spoiled meat and drink from nasty ass water. But, since those bacteria are highly specialized, if they're not used they die off.


That being said, animals aren't immune to giardia and the like, dogs get it a lot from doing this.