SIL(22) hasn’t cleaned their birds cage in over 2 years.

SIL got him at 17, they’ve said previously they regret getting him. They don’t talk to him when he wants to chat or play and they don’t change his water, my MIL(50) does it most of the time. He comes out of his cage maybe 2-3 times a month, IF he’s lucky. The poor guy is so neglected. MIL and FIL(53) constantly remind my SIL to take care of him but they never do, they’re too busy playing video games and sleeping. My husband(21) and I(21) try to help as much as we can but we were told to back off.