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Welcome to JustAnswer! I'm Dr. Barbara and will be happy to be of help to you today.
Guinea pigs can get mites, but they can also have allergic dermatitis from food or things they are inhaling. Mite infestation will need to be specifically diagnosed by your vet, and I recommend that you take her in for a skin scraping and microscopic exam.
I would like to ask you a couple of questions too. Does your itchy pig have any visible skin scale? Also, did her itchiness and sneezing begin after you got them?
Thanks for your response! The most common type of mite infestation is Chyletiella which is very superficial and causes dandruff like scaling ultimate (and usually). Certain beddings can cause allergies which can manifest as itchiness and sneezing. Also fleas and food can cause allergic dermatitis which is itchy.
You just answered my next question. . .reading my mind!?
I think that would be the best. It doesn't sound like she is extremely ill, but mites will not only grow worse on her but also infest your other pig, as well as locally on humans that handle her. If this is all due to an allergy, most likely to her food or bedding, then she had this when you bought her since you are wisely using the same bedding and food. Also, your vet will be able to make suggested changes for her bedding as well as her food.
I am standing by, just in case you have any further questions. Hope this information has been helpful to you.
Great! I know that your vet will be able to diagnose the problem and initiate treatment to get her pruritis (itchiness) and sneezing resolved.
Best of luck to you and your new little pigs!
Wondering how your little pig is doing. Would love to hear!
Very good news that your little pigs are itching less. Don't know if your vet did a skin scraping and viewed that microscopically, but if she did not, the mites would be difficult to impossible to see.
Sure hope all continues to go well and you enjoy your new little pigs.
Happy New Year!