When you suddenly change a cat's food, it can experience some digestive problems at the beginning of the transition to the next food. This can be overcome, but what cannot be overcome with this specific food is that cats, wherever you put them, whether they are on the street or anywhere else, go crazy for this food. It is impressive how cats react with joy when they think they will eat this food. I don't know what it contains, hopefully it doesn't harm them. The digestive problems only occur when changing the cat's food. Either this food is very good that we used to give them before, or it is very bad. Thank you for the other problem that this specific food has, which is that it is not available in a 15-kilogram bag. Also, the offers for this specific food are almost imperceptible, with packages of 9 kilograms and 750 grams. Unfortunately, for some reason, they are not available in Greece. The price per kilogram at 5 euros and 50 cents is extremely high for Greece. There are other cat foods in 15-kilogram bags that are available in Greece at friendlier prices and with offers once a year