Can milk go bad, but still taste and smell perfectly fine?!
Answers:
No, the reason is, when it's bad it's full of bacteria that's what causes the smell. If it doesn't smell or taste funny, it is just fine
I usually used the milk 5 days past the sell by date, after that I toss it
http://www.chineseop.com/others/How-long…
When milk goes bad, it no longer tastes or smells normal. If it still smells and tastes fine, it is not bad.