YES if they are in a room with light then YES before I got a hiding house for my 3 guinea pigs they became gray so you should get an old TV box or a blanket to cover the cage
-SycoBob
that's kinda like my guinea pig, he likes hiding in all his play tunnels and log house, But that's just because your around and hes nervous. go inside the house and look out of the window and your guinea pig will eventually come out
no
As they get in they run back into a hiding place.
i recomend that you don't
Your male guinea pig is trying to mate with your female guinea pig.
guinea pigs
it will hide and not come out for ages (hyperventilating in it's hiding place)
You can't take Guinea Pig's for a walk with leads or anything like that as they are very bad for a Guinea Pig's spine. You are best to either let them go in a run outside or let them out in your house. You are best letting it run in your house, but keep it away from wires and spaces it can hide in. You shouldn't use a guinea pig harness or lead as they can damage their sensitive spines.
If that happens nothing will happen to any of the males.
Keep them with a male guinea pig. Be careful because sometime the male with harrass the female.
A hutch
Just keep a bowl of store bought guinea pig food in your guinea pig's cage and if it gets hungry it can eat out of that. And also you can feed your guinea pig fruits and veggies every now and then. I do the same with my guinea pig, but she seems to have a problem with eating fruits and veggies. :(