my 18 year old female Siamese suddenly developed excessive wax in both ears around May of this year. i didn't notice it until she started shaking her head frequently and then i saw odd, dark brown particles all over the house. there was no odor and she didn't appear to be in pain, just annoyed. i took her to the vet who seemed confounded by it, took a swab sample, and threw his hands up when nothing showed up under the microscope. i went back a couple more times with no success so finally requested another vet who i know is a cat expert. he immediately suspected food allergies or sensitivities, tested a sample and found a bacterial infection which he treated with antibiotic and steroid injections. then he scheduled an ear irrigation because the wax was packed so deeply he couldn't determine if there were tumors or nodules which might be another explanation for the wax. the previous vet didn't want to do the irrigation when i suggested it, saying she was too old for anesthesia. irrigation was done successfully by the new vet and there was nothing abnormal deep in the ears so he's convinced it's food related. she ate Science Diet Active Longevity until a couple of years ago when i switched her to a senior food from Purina, Pro Plan Focus Age 11+ turkey and rice formula. i never gave her wet food until after the wax issue started. the vet insisted that i switch to a less common and limited ingredient diet and to avoid turkey and chicken to start. he suggested duck or rabbit. i tried dry duck and she likes it but have tossed dozens of cans of wet duck food after trying everything i can find which doesn't contain other meat proteins, including unidentified "liver" etc. i finally gave up and am giving her limited ingredient cans which are primarily duck but have some chicken because it's the only one she will eat. now she has her first yeast infection in the ears from the waxy breeding ground and i must put drops in her ears starting last week and you can guess how much she likes that! of course, i still don't know what is causing the wax production and at her age don't have years to figure it out and i don't want her to be plagued by this for the rest of her days with alternate infections from bacteria or yeast or both and regular irrigations with the accompanying risks from anesthesia. oh, she weighs around 7 pounds so doesn't have a cushion of any fat stored to compensate for not eating if she doesn't like what i'm serving. plus i've spent over $1,000 on waxy ears over the past few months and am no closer to a solution. here's hoping someone has had a similar experience and can recommend foods to try which worked for you. i've searched the forums and found some comments about this problem but haven't found any where someone says outright which foods have worked - except the occasional reference to a brand/formula by initials which i can't figure out. thanks!