Can a guinea pig die from mites?

Yes they can. Inadequate intake of Vitamin C can lead to the proliferation of intestinal parasites. Adult Guinea Pigsmusthave 25 mg of Vitamin C each and every day. It is almost impossible for them to get adequate vitamin C from fruits and vegetables. Also Guinea Pig pellets even though enriched with vitamin C do not maintain adequate levels to ensure that the pigs get enough vitamin C. If vitamin C intake is inadequate parasites can invade their digestive system and cause diarrhea resulting in dehydration, weight loss, and death following very quickly. The best way to ensure adequate intake of vitamin C is to buy liquid Vitamin C (in a glass bottle that is dark brown and keep refrigerated, dark brown to prevent light from weakening the vitamin C) and give them 25 mg each day. You can't add it to water because it quickly loses potency. Use a syringe to administer it to the pig. They may not like it at first but they get used to it. It is for their own good.