With regard to the late paychecks, you can file a complaint with the state labor board, which has the authority to investigate the situation and assess penalties against the employer. It is illegal for the employer to retaliate against you for asserting your rights typically.
I would also contact the local animal control offices and report the dangerous dog since you are in fear of being bitten.
Finally, with regard to the documents the employer is requesting you sign, they typically do have the right to require that you sign such agreements as a condition of continuing employment.
Therefore, if you do refuse to sign them, they can legally terminate you typically.
Good luck and take care.
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