What causes guinea pig skin scratches and patchy fur on its side?

This is likely to be caused by a skin infection, possibly due to a bacterial or mites infestation. A clinical examination at your local veterinarian is essential to confirm these clinical suspicions and treat appropriately. Hope this answer was helpful, but please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further. If this answer was helpful please let us know, this will be used to improve our service!

Even though a picture would help to understand better the underlying cause, generally speaking this presentation could be due to a trauma or recurrence of the localized skin infection (likely to be caused by bacteria). A check up, appropriate disinfection and possibly antibiotics (oral, topical or in a shampoo formulation) are needed to solve the problem. Bleeding must be stopped as soon as possible with gentle pressure. Hope this answer was helpful, but please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further.

What a hard situation to try to handle while you are away from Frodo! The reason for the scratching may be any of the things you mentioned - an infection caused by bacteria or fungus, parasites, allergies, or another cause. Until you get home, you can recommend to the person who is watching him for you to make sure there is nothing in the environment that he could be reacting to - pine and cedar shavings can be irritating to the skin, and should be removed if present. Otherwise, it will be supportive care until you get back and can take him in to see a vet and get treatment. His appetite and activity should be monitored closely - getting a digital gram scale (found in the kitchen section on many department stores) is a good idea so he can be weighed daily to make sure he is not losing weight. Make sure his fecal pellets (poops) also continue to be normal in size, shape, and moisture content. If anything changes about any of these parameters, he needs to go to the vet before you get home.

This is probably due to an allergy, although it could also be infection or mites. First of all, in order to rule out skin parasites, you will need to treat with a high quality flea treatment, then ask the vet to perform a skin scrape - this might reveal an infection or a mite infestation. If all of those came back negative, the next step is to treat the allergy symptomatically and try to discover the cause of the allergy. Three main type of allergies are usually affecting pets: food allergies, flea and parasite related ones and environmental type (allergens coming from trees, pollens, dust etc etc). Some medications can be given by the vet in order to repair any possible skin lesions (like steroids and antibiotics). Hope this answer was helpful, but please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further.

In my experience the huge majority of skin issues in guinea pigs falls into two categories: mites and fungal. It's uncommon to see flaking skin and hair loss without it being one of these disorders. Ringworm would be a concern and is very common in guinea pigs. Instead of being a worm, it's actually a skin fungus, and doesn't always have the classic "ring" shape. The only way to diagnose ringworm in guinea pigs is doing a fungal culture where you collect hairs and put them on a culture medium. It can take 10-14 days to get a result, though most positives show up within the first week. If you don't want to do the testing then what you can do is treat those scabs with an over the counter anti fungal cream like clotrimazole. It is basically jock itch cream. Apply a thin layer 2 times a day. It won't hurt anything if it is not ringworm but if it is ringworm, it will help. If you are going to shampoo him I would use a medicated shampoo like this one: https://www.1800petmeds.com/Malaseb+Shampoo-prod10667.html Lather it on, let it sit for 5-10 minutes and then rinse. The contact time of the shampoo is very important! This shampoo has an antifungal agent in it as well as an antimicrobial agent. If you try the ringworm cream and shampoo and it doesn't help at all within 7-10 days then I would recommend you get a second opinion from another vet and find a vet that specializes in treating exotic pets as he may have skin mites. Skin mites in these pets will always cause itching, sometimes severe enough to lead to seizures. If he is itchy then skin mites are very likely. Skin mites need to be treated with Ivermectin injections spaced 10-14 days apart and need to be done by a vet. Usually 2-3 injections are needed to clear the mites. If your vet doesn't specialize in treating exotic mammals/pocket pets then I would suggest you find one that does. I found this vet in your area based on your zip code: http://www.acsevh.com/ I hope this helps. Best wishes!

This problem could be due to a corneal ulcer and secondary conjunctivitis, probably secondary to a trauma or infection. A check up would be needed to confirm this clinical suspicion and as appropriate treatment would include antibiotics and anti-inflammatory eye drops. Hope this answer was helpful, but please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further. If this answer was helpful please let us know, this will be used to improve our service!

Most of the oral meds are on prescription and should be discussed with your local veterinarian. Disinfection of the skin may be achieved at home with very diluted hibiscrub or betadine or salted water baths. Hope this answer was helpful, but please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further. If this answer was helpful please let us know, this will be used to improve our service!