Qualitatively really bad but unfortunately tasted my cats on some days nothing

So the food is qualitatively really bad, I think once everyone knows. In gerademal 2x 4% meat & meat by-products safety expected me not a super food. The worst part, however, I find that it contains sugar, because sugar can cause diabetes in cats. Of course, many are still have the cat previously eaten in the setting everything, but it was people with us as well and today we eat differently from before.
I usually feed more varieties such as Schmusy what is of high quality and does not cost much or the Aldi food. However, there are days that want my cat Felix. I did it then, when I am not versed so chose Felix, as this is touted in advertising frequently. Therefore, I suspect that this will continue for a while that my cats want now and then Felix.
All in all, I say to myself if the cats also eat other food, should change, because there are enough high-quality food that is also low.