As others wrote here, it takes a while before the tablets act. You must be really 2-3 weeks, possibly persevere a little longer to see if it is stopped. There is no guarantee, there is no well. Some dogs talk to it, others not before. Something similar happened to me with other means (DAP, great for many, my Lütte not respond). I've now ordered again. Is not exactly a bargain, but what does not do anything for his Fellnase? For a small dog in the ranges 1 tablet, the price is to be absorbed. For large dogs, it is probably bad in the money. Nevertheless me a recommendation for the tablets.