hi my new horse suffers from Photosensitivity and has sore eyes all year round from dust sun you name it. Vet has suggested trying supplements. Global Herbs Pollen ex has come up a lot but would cost me £80 a month to use it. Has anyone had any good results from feeding this. And is there anything else on the market that can help him. He has a guardian horse mask which he wears both in the stable and outside And on bad days has eye drops and bute.Thanks so much