These include Vienna (capital of Austria), Bratislava (capital of Slovakia), Budapest (capital of Hungary), Belgrade (capital of Serbia), and numerous other large municipalities. Historically, the Danube was an exceptionally important river to the Greeks and Romans.
At that age, kittens are eating on their own and going to the bathroom on their own, so they can be away from mom for a day while she gets fixed. If mom is feral, when the kittens are 5 weeks old, that is the point when you can get mom spayed and release her right where you trapped her. Kittens can be safely fixed as soon a they hit 2-3 lbs., which is generally between 8-12 weeks.
That is the danger in paying the wolves to get them off your back for another month. If you agree that the bill is legitimate, and you intend to pay it off, then do so as quickly as you can. Even if you paid 99% of your bill, it can show up for 7 years from the date of your last payment. It does not just disappear, it becomes added to the national debt and becomes everyone's problem.