To help prevent bites, Animal Legends Flick Horse and Pet Spray has worked well for us. I use it on my dogs and horses. (It comes in a concentrate you need to dilute - instead of using water, I use vinegar). A light layer of petroleum jelly on the belly or sensitive skin areas helps repel nasty bugs too. Or just try some plain old apple cider vinegar in a spray bottle - I have had good luck with that on some in the past.