- And got the T-shirt
But you need to be very sure she's eating -- guinea pigs MUST eat frequently, or they'll develop pain, possibly fatal, digestive problems. So weigh her a couple of times a day, same time of day each time, and record her weights. If she's losing, push more food into her.
A guinea pig that's not eating anything on its own needs 100+ cc. of Critical Care or a pellet slurry for every kilogram it weighs, every day, split into 6-8 feedings. Adjust up or down according to the pig's weight, and down if the pig is eating some on its own.