Will I get in trouble for not reporting a dog bite?

I was bit by a dog Friday night at my home and had to put the animal down. It tore off half my ear. No report was filed with the police because I refused to do so. However, my roommate called the police non-emergency number so the dead animal could be removed. He states he didn't see them taking a report and that he was informed that no one was in any trouble/facing any charges. However, the dog warden left a note on our door stating we have to complete a report with them regarding the incident. Do we have to do this? The dogs dead and I'm not going to file a suit or anything against it's owner. The same dog bit me earlier this summer. I didn't want to put him down, I thought it was a fluke. And at the time, my boyfriend lied about the attack. I like an idiot went along with the story. So I'm currently facing falsifying report charges regarding the incident and don't know what happened this weekend to come up in court at the end of this month. Would the prosecutor even be able to bring up a separate incident? And if I do fill out a report with the dog warden can it get me or my roommate in more trouble?