neem oil

That Scaly Leg Mite spray didn't do the job. So it seems that the problem is something other than Scaly Leg Mite.

It hasn't been possible to identify the problem via the internet. There's not a lot about duck problems. Most searches fetch up a load of duck recipes.

We searched on herbs for bird skin problems, and from that were led to try tea tree oil. We already have some tea tree oil spray: we tried that, but without major effect.

On further searching, we came across neem oil, recommended for pets and for mites, lice and scabies problems. We had half an inch left in a bottle of 'Nice'n Clear' head lice lotion containing neem oil, so we tried that. Tom stopped biting his leg for about four hours, and we now put the lotion on regularly.

We've sent for a jar of pure neem oil, and when it arrives, we're going to use that.