Hi again,
I was hoping to get a bir more information in order to give you advice specific to your dog. Unfortunately, I have to go out for a few hours now.
I'm sorry that your dog has such a bad ear infection and would like to try to help.
Ear infections (otitis externa) are quite common, and Poodles are one of the breeds most often affected. There may be an underlying allergy that is making your girl prone to these. Obviously you have wondered the same thing since you mention trying different foods.
Otitis externa is commonly caused by yeast, bacteria or a combination of both. Quite often, the ear medications that I prescribe have a combination of anti-fungals to treat the yeast, anti-biotics to treat the bacteria and anti-inflammatories to decrease the pain and inflammation. The names of a couple of ear medications I commonly prescribe are Surolan and Otomax.
If your dog has been on ear drops (usually they would be given twice daily for 7-14 days) and there was NO improvement, then it suggests that whatever is growing in there is resistant to those drugs and a different drop should be tried.
If the ear drops did improve the ears, but they promptly became infected again, it suggests an underlying problem such as allergies. These can be to something inhaled (then we call the allergy "atopy") or to something eaten (usually a protein - it could be anything from chicken to beef to lamb or ANY other protein that the dog has ever eaten).
In the case of food allergy, we usually recommend a food with a NOVEL protein that the dog has never had before (venison, fish, duck, rabbit are all options) and NO other sources of protein. That means NO treats, NO rawhides, NO table scraps.
In the case of atopy, we often have to manage the condition with antihistamines, omega 3/6 essential fatty acids and sometimes corticosteroids.
In terms of what you can do at home without seeing a vet, I could make a few suggestions:
1. Burrow's Solution (Buro-sol, http://www.feelbest.com/Pages/ItemDetails.aspx?GroupID=EADRO&TYPE=FINE&LINKPAGE=ItemDetails.aspx&ID=05546000017 ). In Canada, you can get Burrow's Solution over the counter at a pharmacy. I believe it is widely available in the USA as well. It is a gentle astringent that is very useful in treating ear infections. Many veterinarians carry it, compounded with 2% hydrocortisone (for that you would need a prescription). But you could certainly try it twice daily for 7 days in your dog. Instill 3-5 drops into both ears twice daily for a week.
2. You could start your dog on Essential Fatty Acids, orally. These decrease inflammation in the body and are very helpful with skin, hair and ear issues. EFA-Z and DermCaps are a couple of brands. It takes 8 weeks to see improvement.
http://www.vetamerica.com/index.asp?PageAction=PRODSEARCH&txtSearch=Efa+Z+Plus+Liquid
http://www.petplace.com/drug-library/derm-caps/page1.aspx
3. Vaginal yeast cream may kill yeast in your dog's ears. If, however, the problem is also due to bacteria, it will not help with this.
4. Antihistamines - you could try hydroxyzine or chlorpheniramine since atopy may well be part of the problem with your dog.
http://www.veterinarypartner.com/Content.plx?P=A&C=31&A=557&S=0
http://www.veterinarypartner.com/Content.plx?P=A&S=0&C=0&A=529
http://www.balgownievet.com.au/1_gen_derm_drugs.htm (dose)
Oral antibiotics are rarely needed to treat ear infections, as the drug doesn't get to the site of the infection effectively. When you give an oral antibiotic, it ends up in the blood stream, and this is not helpful for treating ear infections which are on the skin surface within the ear. Occasionally I use oral antibiotics if there are signs of an INNER ear infection. This is rare.
Here are some links about Otitis Externa that you might find useful:
http://www.veterinarypartner.com/Content.plx?P=A&S=0&C=0&A=632
http://www.peteducation.com/article.cfm?cls=2&cat=1591&articleid=273
http://www.sniksnak.com/doghealth/earinfections.html
Good luck with your dog. If this has been helpful, please hit the green "Accept" button and leave feedback. I will be back in a few hours to provide more information if you need it!
Fiona
I am a licenced veterinarian practicing in Ontario, and will always do my best to answer your questions. My on-line help, however, cannot take the place of a hands-on examination by a veterinarian.