system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How are animals, specifically carrion birds, able to eat rotting flesh without ill effect?
gpt
In a number of ways.

One is that they can have stomach acid a lot stronger than that of non carrion eaters.  This can kill a lot of bacteria.  

Their immune systems have also evolved to deal with the bacteria and their toxins and so they have a large number of antibodies always ready to go to neutralise them.

And just like us they have bacteria in their intestines but they've evolved to use the ones that would be deadly to us to help them digest their food.