Yes, I have read that too !
On the guinea lynx web site they say, here is the quote: " In a few cases, guinea pigs under anesthesia have aspirated food trapped in a hidden pocket in the throat."
However, according to both cavy spirit and guinea lynx, when talking specifically about surgery and under anesthesia, they both generally agree that most guinea pigs cannot regurgitate or vomit/choke their food like humans, cats and dogs can while under anesthesia., so there is no reason to have them fast for more than two hours before surgery.( aside from the fact that they can get hypoglycemia and gastrointestinal changes because their bodies need a constant supply of food.)
So, am I understanding this correctly, that guinea pigs can't choke ? If they can "cough" can't they also choke ? Hmmmm...I really am still, not sure if they can or not. ???