IF they are not allowed in the lease, you made a choice to do something against the property owers wishes.
You do have a couple choices: 1 sell them off quickly, 2 be honest and upfront with a new landlord and find another place quickly but don't expect anything returned from where you are at, and 3 find someone you trust to hold your collection while you get your poop in a group.
**Let this be a lesson to all those that are hiding animals on property they don't own. Its not just about you and your wants. At some point there will be animals at risk.**