So have a few extra perches on hand. Perch and Twirl Toys Unique twirler toy comes mounted to a durable manzanita perch Cotton rope perches are also are a great choice, I have one rope perch in most of my cages. Of course side to side is also a great choice for placement. They are easy to clean, just toss them in the washer, or wet them down and hang them to dry. You need to watch for any strings on the perch, and throw it out if it gets to stringy.
Birds can catch their nails on string, and swallow it as well.
Yes, I have one chain perch in each of my parrot cages. If you want to put a chain in your birds cage keep in mind that open linked chains are not good. Birds can catch their heads in them. Closed link that is to small for the bird to get its head caught in, and to heavy for them to chew apart, is the only kind I would use. I buy heavy chains like you use for locking big gates.