Fly Spray

[LongShot]

I was up at a tack shop the other day looking at fly spray, they're a small company so they were out so she told me to call and order. She said give her the brand I want and she'll get it but what one should I get?Normally I just get what ever brand but it doesn't sound like a good idea to keep on switching. Plus my farm is surrounded by swam so I need a good one.

What brand of fly spray do you think I should get and what's the normal price?

Thanks!