My name is ***** ***** I’ve been involved professionally with dogs in the health and behavioral fields for over 18 years. It will be my pleasure to work with you today.
What you are describing is a hematoma like you suspect. This occurs frequently in dogs with floppy ears and usually is caused by excessive scratching. If left untreated, the body will generally absorb the fluid between the ears, but this can result in a cauliflower ear appearance. Your Vet will lance it, drain the fluid and bandage the ear. To read more about hematomas, go here:
There really isn't much you can do except keep her from scratching the ear and shaking her head. Often an elizabethian collar (e-collar) is used to prevent a dog from scratching their ears.
Since ear infections are often the cause for excessive scratching of the ears, let me give you information on that as well.
It is probably a yeast or bacterial infection. You can use a mixture of distilled vinegar, water and alcohol on a cotton ball to gently clean the ear. In a yeast infection, you will see a golden to black buildup in the ear. You may also notice redness and bleeding, head shaking and your dog scratching the ear as well. You can try some miconazole cream to see if it helps until you can get in to see the Vet, but it isn’t a cure for underlying condition.
You will have to have your vet look at it and determine if it is fungal or bacterial in nature so the appropriate medication can be given. Ear infections are not pleasant for your dog and I hope you can get him seen soon.
The following site has a recipe for a home remedy that may provide some relief though I recommend visiting the vet for medication.
Zymox with cortisone has been used by some experts to clear ear infections as well. You can read about it here:
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Since there have been recalls on certain foods, please check the following site to be sure the food your animals eat is not affected. If it is affected, contact your vet as soon as possible. Have your dog seen if they have any symptoms.