2scents said…
“I heared from a rav that a very large percent cows are considered Treifa.”
I hope you are kidding!
It may well be so that a very large percent cows are considered Treifa, – BUT – you wouldn’t know that until AFTER they are shechted! – soooo… even chalav Yisrael milk could have come from a cow that ultimately is determined to be not kosher – FOR IT’S MEAT!
A very machmir rov told me years ago that there was no problem buying a cup of coffee at ‘Chock Full of Nuts’ diners (which were common at the time, – and also served a large variety of otherwise traif food).