What could be wrong with your 2 guinea pigs if they keep making a hacking kind of noise and when you give them their dry guinea pig food they seem to throw it up?

Throwing up is not a good thing, they are sick and if you can afford it, you need to take them to a vet. Guinea Pigs are considered an exotic pet, some vets do not treat them, so call around.

Are you giving your Guinea pigs Vitamin C drops in their water daily? This is very very important for their health. Thier bodies do not produce Vitamin C.

I hope you are not feeding them head lettuce this will make them very ill.

They love carrots, romaine lettuce, and baby spinach leaves.

Also, regarding their bedding material. I hope you are not using cedar chips; this can be toxic to small animals who are in an inclosed area. Pine chips are so much better. You can purchase the pine chips at Walmart.

Answer

Um...well you know nothing good ever comes of throwing up! ;) I hope you know Guinea Pigs are not like Hamsters. Hamsters don't really need Vitamin C. Actually, it hurts them if you give them it! (Don't give hamsters citrus fruits!) But Guinea Pigs need it. That's why ever Guinea owner puts 2 drops of Vitamin C drops PER OUNCE daily in the Guinea Piggy's water. :) If your not doing anything wrong (that you know of) you should try and get them to a vet!

P.S person above me, thanks for the tip! :o I never knew it mattered what kind of lettuce you gave them!!! (good thing I got my Guinea yesterday!) ;)

-GuineaBoo