yes, Guinea pigs make low noises to tell that she/he feels sick
Its Happy
Depends on the circumastances, when stressed/ excited / getting fed they make squeaking noises.
Guinea pigs make noises to show their feelings like fear or exitment.
Guinea pigs make a variety of noises to communicate, including squealing, purring, chirping, and teeth chattering. They squeal when they are excited or scared, purr when they are content, chirp when they are exploring, and chatter their teeth when they are agitated or in pain.
Guinea Pigs squeak because they are scared or happy mine squeaks when i give him food
Loud squeals and cries and even grunts.
No it should not
Yes, like "OH! I love it, one more time please, uh!"
maybe because he/she is lonely or it's sick
your guinea pig may not be making any noises because it is NOT happy. when it is happy it will make plenty of noises. it may be unhappy because: you arent giving him enough fruits and vegtables you arent holding it enough(they should be held atleast 5 times a week) its cage is dirty, for more helpful tips you can go to the website guineapigsclub.com!
it usually means it is eather excited or scared,sometimes hungry.