Vitamin C is essential for guinea pigs and Degu because they eliminated it every day. You must give them a supplement.
Vitamin C found in their food is not enough.
For rabbits, chinchillas, rats, consult your veterinarian before offering them this supplement.
Rabbit, guinea pig, chinchiall: 1 tablet per day
Rats and Degu: 1/4 tablet per day
Keep in a dry and cool place.