When I'm selling a bird, I realize that I have no control over what happens to it once it leaves my farm. I've also come to terms with the fact that I don't want it anymore, it is no longer a pet. If you want your bird to have a super good life, keep it, don't sell it. Your definition of a good life may be much different then another persons idea of giving a chicken a good life.
Just because someone has trouble spelling doesn't mean they can't take care of birds, my neighbours immigrated from Germany a few years ago and can't spell very well. English isn't their first language, that doesn't stop them from providing a decent life for their animals.
Maybe this person sent the email through their phone and wasn't even typing on a computer? Sometimes I check my emails from my phone, if I had to sit there and type out every single word it would take forever, and the message probably wouldn't even send in the end.