Paint damage caused by Vogelkot

We drive a Ford Fiesta BJ 2006. Now we had to find out the one dove on the roof.. had.. when I wiped it away the sheet came out! Ford probably has the opinion that this is normal. We had until recently still a Mondeo 14 years old, the dove could not hurt him. Lt. Ford I have to put it away immediately and even a few hours will be enough! I find it the hammer should sleep now by my car and constantly wipe! Maybe one of you has a similar problem and can help me!