The fat balls are correctly also the net because I think as the Natutschutzbehörde that the birds should work a bit to get to their food as it is so common in the great outdoors.
These dumplings are just plastered, like the 100 Dehner.
3 pieces I hang in the morning to the bird feeders at night, they are wiped away.
I feed all year sunflower seed and soft food and these dumplings and variety of birds is impressive.
In winter, sometimes even fewer birds than now come since the spring and now in the summer.
Now especially the titmice come with their fledgling young and Gezehter the young birds is really fascinating and worth seeing.
So my recommendation to buy!