The first cat arrived paraplegic (he could only close his eyes) the second death happened. We tested for the first time the effectiveness of sav amazon France and were conquered. The second exchange request was refused and replaced with a refund, customer service contacted by telephone was relatively poor. This product is still guaranteed two years according to the product that is against erroneous in the number of batteries needed (4 * and not 3 * LR14 LR14).