These links will help you find medical assistance (not all medicines are safe to use in "Pocket Pets", so you want to have your friends examined by doctors who know how to treat exotic pets):
http://www.cavyinfo.com/html/vet.htm http://www.aracnet.com/cgi-usr/seagull/vetfinder.cgi http://cavyspirit.com/vets.htm
In the meantime:
1) Raise the temperature in the room where they live to 80F degrees.
2) Move "healthy" animals to new cages with fresh bedding (that you will change DAILY), and disinfect all old cages, dishes and bottles.
3) Check everyone several times daily and remove any "questionable" or sick animals as soon as you notice them...keep sickly animals in a separate enclosure so that you can provide palliative warmth and quiet.
4) Do not feed any "wet" foods that can become infected with spores as they lie in the cage(s).
If you need additional support at this time, please click "Reply", otherwise I thank you in advance for your "Accept", and will hold a Good Thought for you.
Retired Veterinary Technician
Dog, Guinea Pig, Hamster, Gerbil breeder / Reptile Keeper / Bunny-Ferret-Exotic Specialist