What do fanciers honestly think of this product?Ive used it for the past three years and havent noticed a bit of difference in the pigeons or there droppings,the problem with the De weerd products is they never tell you whats in them!i thought it was illegal for antibiotics to be sold over the counter in this country.I also know of a fancier that had paratyphoid confirmed and he used parastop on them and it never made one bit of difference to them.I see Bert Braspenning recomending a product from Dr van der sluis for paratyphoid has anybody tried it?