We surely want Brothers Blend to be perfect for your cat(s) and hope never to hear of difficulty, but it happens.  We have a quiet money-back guarantee and we will honor that as always.  We’ll even refund your shipping if the product really doesn’t work for you.  But we ask you to REALLY try it and we only agree to do this ONCE.  If you want to exercise the guarantee, all you need to do it tell us with details of your order (date, invoice number), and we’ll refund all of your purchase.  No returns necessary.  But let’s be fair; we will not sell you future product with this same anything goes guarantee.  Thanks for your understanding.