After you lose your membership, your animals do not go away! They do remain there, but they're locked. However, any member clothes you may have on any of your animals do get taken off and locked as well. If you have things such a bow and arrows, worns, fox hats, beta swords, etc. placed on your animals, they will not get taken off. Everything stays with you, just changed up slightly! Hope this helped!
-Gamzee413 (IM STILL ALIVE)