Ideally, get it in a dark room and shine monocromatic light (the colour you want to test) onto something the guinea pig might want to see. Know that they have a good enough sense of smell so doing this with food might be tricky however.
most guinea pigs at birth run round in circles and mother rejects the baby
Well usually they get really cloudy, like a milky white.
Throw a cotton ball near it. If it turns it's head towards the cotton ball then it has seen it. Throwing a ball will not work because they can hear the ball instead of seeing it.
yes you can because once they get to the age were they can see you wave your hand in front of there face and see if they respond.
you can't. unless you have a trained guinea pig that somehow can talk to the baby and say what you want to tell it.
What if your Guinea Pig has just had a baby - what call a vet or what?
Turn your guinea pig upside down onto its back press down slightly above if something popps out its a boy
a baby guinea pig is known as a Pup. (though never a puppy)
when my guinea pig had babies i held her and she was fine
I don't think there is a test to tell if a guinea pig is pregnant, but a pregnant guinea pig will not let you rub its stomach. If you are still unsure, take your guinea pig to a vet.
Baby guinea pigs will usually fit right into the palm of your hand, and have quite large feet; adult guinea pigs are easily the size of a football.
you van tell by the toe nails if they are thich and long an adult if they are thin and short a baby you can tell if the toenails are short and thin it is a baby
Unfortunately, there is no way to tell if a guinea pig has ever had babies before.
Pups or Guinea piglets.
One would be crying and throwing his or her guinea pig
Sure as slong as it doesn't get into his eyes