I have a malinois that has had an allergic reaction twice in the past year. The vet bill ended up being expensive. Do you know of anything over the counter that could help.

I have a malinois that has had an allergic reaction twice in the past year. His muzzle and eye brows swelled and were extremely itchy. Both times I ended up bringing him to the Emergency vet after it became worse rather quickly. Benadryl did not do anything and the vet ended up giving him steroids. The itching seemed to have started between the toes like he stepped on something and then a few hours later I awoke to the noise of him itching in his crate. Within an hour he started to look like a sharpe dog. The vet seems to think has got bit by something. Do you know of anything I can buy OTC and have here or do know of any home remedies. The vet cost is 160 dollars to get the shot and since it has happened twice I'd like to be ready next time.

Thanks for your help,
Tim