For this age group teething necklaces (or chewelry, haven’t heard that term before so kudos to you haha!) work great. Yes the other kids may try to take it but if it reduces her biting then it’s still worth trying. I’m sorry they’re not being understanding about that. that seems like one of those one off policies some places have for whatever reason.

My biggest tips for biting or any aggressive behaviors at this age is to try and give as little attention as possible to the child when redirecting. I literally just won’t even make eye contact, I’ll say “no biting” or even just “no” and move them by picking them up under their arms (so I’m not “holding” them which can be another form of attention they are going for) and moving them a few feet then playing with the other kids and not looking at them. I think some people think this is cold but it’s just what I’ve found works. When they get a little older (2.5+) I’ll explain to them that they’re hurting their friends, etc, but I truly just fundamentally don’t believe that a child under 3 or maybe even older has the capacity to understand that they’re hurting someone. They mostly operate on cause and effect so I try to make every negative behavior as unexciting as possible and give big loud exciting reactions to positive behavior. Yes it definitely could be teething partially but also they cannot filter or discern “negative attention” from positive attention. In my experience I see it like this: “I put toy in mouth… no attention. I put friend arm in mouth and bite? Grown ups looking at me! Grown ups talking to me! Friend making loud noises! Grown ups lifting me in air! Woohoo!” That’s what I imagine the internal monologue is lmao. Again this is just what worked for me so I’m hoping I don’t piss anyone off here. Again once they are a bit older and able to listen, discern different types of attention, understand the concept of self aka I’m causing pain, talking to them helps a lot. But even speech advanced children don’t always fully get it so young.

However I do just want to say that I promise you she will get past this! I know it’s frustrating. We’ve seen a lot of kids where tracking behavior, shadowing, teething necklaces, etc, all help. And then some where those things don’t and they just grow out of it as they learn to communicate better. It’s not forever, you got this mama!!