
Steroids also lower the immune system too which makes it harder to fight off the mites if it is them.
Demodectic mites I beleive can burrow quite deeply and be difficult to find on a skin scrape . But by scratching his ears with his paws , whathever the cause is due to , it is merely transfering it from ear to paw and vice versa.
Which does make me inclined to think it is a mite rather than contact contamination.
Gus has recently had a scrape and only bacteria was found - no mites . So the vet is inclined to think that maybe he had had a graze or tiny cut and when he has been licking it , it has become infected, causing it to itch more and in turn does not clear the infection . Antibiotics worked a little but didnt clear it up fully so that when the course was finished the infection was still present.
We are now on deifferent tablets (Rilexine?) and the itching has so far stopped .
Fingers crossed