Of course you must, given the very low price here do not expect high quality Inhaltststoffe. As the reviewer has pointed out Fusselbiene vividly and in detail, you should make sure in the cat food on high-quality protein. Our Stubentiger normally get wet food from Almo Nature, Feline Porta 21 Schesir or Carny. There are as a treat dry food from Applaws or Orijen. The diet is supplemented by raw meat or even cooked chicken. From time to time, however, we feed sometimes a cheap bag in between. The cats love this meat mix and our picky eaters long here to like. Not to be "tearing" and for permanent use it however.