Its Hungry.
I had a guinea pig for 10 years (he died year ago of age)
And everytime he squicked i gave him seeds and lettuce
If your guinea pig is still squeaking loudly in a shriek when u give it food then stop rattling any paper or plastic bags and basically try not to make too much noise at all. If it is still shrieking I don't know but if it is only squeaking quietly in a happy sort of way then that is completely normal and u have nothing to worry about
Put one in a different cage
Most belts can be stopped from squeaking by adding lubrication. This can come in the form of belt dressing or even common bath soap.
First of all, guinea pigs shouldn't really live outside because it makes their life shorter, so if i were you i would just buy a indoor guinea pig cage and bring it inside so there will be no more rats!
To stop your kitchen and dish washer door from squeaking try oiling or greasing the hinges.
Try sprinkling talcum powder over it then sweeping it up. It should get between the cracks and stop the squeaking.
you should wait and watch a little longer to see what is wrong and if they stop then leave them if they stop and start again then put then in a different cage not together
You may want to add extra bedding or a shelter for your guinea pig as they may just want to burrow. I got my last guinea pig cage here http://www.petproductsbyroyal.com/rabbit-guinea-pig/ and love it!
By holding it and training it,slowly it will trust you.You need to hold him or her every day if you can .
Lay still.
You should not keep the cage outside anyway. I suggest getting a new cage and keeping it inside. It may be cold for your guinea pig outside. If you didn't keep the cage outside earwigs would not have got to it.
Usually if your guinea pig isn't very talkative its because it is lonely and if you don't already have a second pig that should be something to look into because guinea pigs need a friend. Also please help innocent guinea pigs by adopting one from an animal shelter!!!