When they are about 3 weeks old.
Guinea pigs pur when they are upset and want you to stop touching them.
guinea pigs are also commonly known as cavies
usually guinea pigs will eat the meat and stop at the skin. same with watermelon
Guinea pigs do not molt. Molting is when an organism with an exoskeleton 'sheds' it's outer skeleton and grows a new one, to regenerate. Guinea pigs shed their hair. They just do it; you can't stop it.
You stop feeding them when they die.
No why would you ever think that the chemicals are toxic to Guinea pigs and babies you should stop using them.
Yes. Definately!
When their fully furred.
They stop having babies at six monthes of age. after that, if the guinea pig get pregnant, babies cant be born which would kill the mother because a couple bones close after that age and babies cant come out.
cut tail off around neck.
Not if they have been at it for a while. They need to be kept separate.
Put one in a different cage