回複：我的房客違反合同，現在房子裏多住了兩條狗（合同裏是兩條，現在有四條），PM email我要不要在合同到期時趕走他，大家給些

You don't have to renew with him: but I'd raise the question before lease term ends and maybe he'll rectify the situation.  You can even initiate an eviction process for breach of lease agreement ANYTIME.