I have already worked and I am currently working with some equestrian brands.
They usually contact me, I look through their website to see if their products fit my audience. After that, brands send me some of their products but I only feature them on Equestrian Trend if they are really good. I always test everything first because I can't suggest my readers something that I wouldn't use.
I receive clothes, accessories or products for my horse.
But the essence of blogging isn't really about getting stuff from brands! :)