This is also today. I am so scared for him.
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Have you got somebody else who can hold your guinea pig? It is not easy to treat right next to eye. You may also find that that creaming alone may not be enough.
Otherwise use some of our piggy whispering tips to assert your authority (as well as show your love) to tell your piggy to behave in piggy style.
Understanding Prey Animal Instincts, Guinea Pig Whispering And Cuddling Tips
Vets in this country have made good experiences with a systemic oral solution that contains the active ingredient itraconazole (UK brand name: itrafungol, which is licensed for cats) in the last about 7-8 years. It is now more and more frequently used by vets with access to a small animal specialist. Itrafungol is not licensed and prescription only, so your vet needs to be willing to order and prescribe it for you. It is much more effective because it get everywhere and does not make the eye swell up - and it is much more easy to medicate once daily than put cream on an uncooperative piggy three times daily.
Please be aware that ringworm is highly infective and that you can catch it, too. It is VERY important that you get hold of a good anti-fungal disinfectant; normal disinfectants are only anti-bacterial. It is also ABSOLUTELY vital that you practise good hygiene and handle a ringworm piggy only with disposible plastic gloves and that you wash your hands and arms thoroughly afterwards as well as wash any clothes in contact at a high temperature
At some point you will have to give Ozzy AND his companion one or two fungal baths to a) prevent Ozzy's companion coming down with ringworm as well and to prevent Ozzy from getting more ringworm patches, and b) at the end of the treatment to remove any ringworm spores from the coats to prevent a re-infection. Please note that ringworm always gets worse before it gets better as it runs its course, but it is treatable.
PLEASE take the time to read our ringworm guide. It contains pictures of how ringworm develops (including from a guinea pig with ringworm next to the eye), so you'll know what to expect. It also tells you exactly what you need to do in terms of hygiene to get rid of the fungus once and forever and not infect yourself.
Our very helpful and detailed ringworm guide:
Ringworm: Hygiene And Pictures
I would also strongly to get hold of some nizoral shampoo from the pharmacy and to use it for washing your whole body with it to prevent yourself from coming down with ringworm. You can also use the nizoral for your guinea pig baths. It is very harsh on the skin if you do a full course with baths every three days, but it is OK for just one or two baths.
Please bathe your guinea pigs in a bowl on the floor of your shower or your bathtub (sat on a towel for grip) to prevent them from injuring themselves badly in case they freak and blind jump and to make sure that they cannot run off.