They sounded like birds singing away whenever I headed up the stairs to my boys' room. There was a guinea pig table in my son's room. It had a 6" wall on the outer edge, and amazingly, the Guinea Pigs would not cross that wall. Well, one of them would go over the edge now and then. It was no problem though. The boys just called our dog Max to help them find it. He'd sniff around till he found it, and then yelp at it till we came. The rest of the Guinea pigs would stand up on their back legs, leaning on the little wall, and look over at us, squealing, singing away!
My boys have a boa constrictor and pythons as pets. When they saw the sign on the telephone pole advertising 8 free Guinea Pigs with table, they jumped at it thinking they would breed Guinea Pigs to feed to the snakes! They did breed them, but when Guinea pigs are born they don't look like the ugly, naked, little offspring of rats. Guinea pigs come with a full coat, and look like miniatures of the adults! The boys just could not bear to feed them to the snakes, so the colony began to grow. Then one day after changing bedding they suddenly began to die, one after the other, till one day the last was gone. Later we discovered that even though the bags of cedar bedding say it is for Guinea Pigs, it is a bad idea to use it for Guinea Pigs or for snakes (the snakes survived).
Now, with the boys grown and in their own homes, we have a Guinea Pig again. Whenever I go in the garage she squeals and sings away. I change her water, give her more food, and rub her head (she closes her eyes). That little thing pretty much drinks her own weight in water every day! I went out and bought her more bedding (it said it was for Guinea Pigs). My son rescued her before I got the bedding in the cage. It was cedar again. He went out and bought the right kind and put it in. When I go home today the Guinea Pig is still there waiting for me to come in to give her more water and rub her head.