Can the law make you remove your dog from City limits if there has been no complaint of the dog biting or attacking anyone. There was no police report

I have had to remove my pet from my home, because a officer of the city said he was a vicious dog. I had to go to court over two citations, and obstruction of service. I haven't had any complaints about him. Everyone likes him. The children on my street all like playing with him. He has even been to work with me, I work at a nursing home. He hasn't been in the visitalty, but the workers have signed a petition , saying he is not visious. They have all pet him, he a very good natured dog. I just don't understand all of it. Can you help me understand?