Are there any opinions on the best fly spray? The one I’ve got at the moment is way to expensive and comes in small bottles

I used to make my own one too but then I tried botanica it's great. It's against fly's, for a shiny coat, for injury treatment and just incredibly helpful. And it's not expensive.
You can make your own. I use apple cider vinegar and tea tree oil. I can’t remember the exact recipe but I’m sure you can find one similar on the internet
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