Can a guinea pig eat bananas?
Yes, a guinea pig can eat banana but should (like other fruit) only be given in very small quantities and a couple of times a week. Just a small piece of banana each time is plenty (a cm wide).
Sugar can contribute to a guinea pig becoming obese which can lead to health problems and guinea pigs are actually much better without this in their diet. they don’t seem to crave sugary foods like we often do.
Make sure they have constant access to hay. They should also have guinea pig pellets daily and fresh vegetables.