There will be a lot of people on here with helpful hints I am sure, maybe if you specify what the allergy is it may help people know if their advice/experiences will be of any help/use.
we dont know what his allergy is because it would be to expensive to have tests done by the vets as it could millions of things. he has small bumps on his shoulder and saddle area. at the moment we have just started using sarc-ex from global herbs and he is currently wearing a fly sheet at night, wondering if there were anymore tips or advice