Gatorbytes, I did try coconut oil for a couple of weeks and I think it helped his right ear, but the left one is still infected. The vet says the right ear looks great and doesn't need any treatment.
msvette2u, thanks for the suggestion. My vet didn't recommend an ear wash, just told me to clean it every day before applying the enrofloxacin ointment, so I did some research to find an ear wash that might be better than what I already had. The Malacetic cleaner arrived a couple of hours ago - it has boric acid, acetic acid, glycerin, polysorbate, and triethanolamine in it. I think I'll start it tonight but talk to the vet about Vetericyn.
As for allergies, I don't know. He's on a grain-free food with lamb and he eats boiled chicken mixed in with the kibble. I tried raw, He was terribly itchy for the first couple of months but I've seen a huge improvement in that lately. Of course, that could be an environmental thing, since it's winter now. What do you do if a dog has environmental allergies?
I am not a vet or doctor, and not responsible for anything that happens if you act on what I say below. I'm simply sharing what I have done and read to give you something to discuss with your vet!!
Baytril contains enrofloxacin as the active antibiotic ingredient. I see research information on meds showing that some psuedomonas is not as susceptible to enrofloxacin as needed to make it an effective treatment.
Tobramycin is an ear antibiotic given to humans. It is discussed online as being effective against pseudomonas aeruginosa.
Liesl had a mild ear infection--no frank pus, but lots of scratching and shaking her head. I used some left-over Tobramycin ear drops I had from an ear infection several months ago on her ear, and she responded immediately and the infection went away.
Maybe you should discuss with your vet having him move away from his "go to" antibiotic and consider something more effective for your dog. At least call another vet and find out what they use, then research it to see if it might be more effective. Good luck.
The lab results have a list of antibiotics and all of them say "Resistant" to pseudomonas, with only enrofloxacin and another antibiotic (amikacin) listed as "Intermediate". There are no antibiotics listed as "Susceptible". From what the vet has said, my discussion with my RN and lab co-workers, and my respiratory therapist dad, there aren't a lot of antibiotic options for this particular bacteria. I don't see Tobramycin on the list, though, so if it hasn't shown improvement when we go back for a check up I'll bring that up with the vet. I like that the Baytril doesn't seem to cause any kidney or liver damag, unlike some high powered antibiotics.
This is so frustrating. After five months of working on his ear, it's still just as bad. There's never been a day when his ear hasn't hurt. When he first came home to us, his ear was very red and he would cry if you got anywhere near it. Now it looks better and he will let me clean it without crying sometimes, but it's still terribly dirty and infected.
This is the day we brought him home. You can see just from the pic how red and infected his ear looks (his left ear is the bad one, but the right one was also infected and has cleared up now.)
This is from the day he had his ear flushed and cultured. You can see that it looks healthier and is white instead of red. He seems to have more hair in the ear now, too. I guess there has been improvement, but not what I'd like to see.