Yeah btdt with giving away some we should have kept, but I agree they can take over.
I would say just explain to the children that they need to sort through them and make piles as pinkballerina suggested. And then they can share them with other children who don’t have any stuffed animals.
I guess I’m not a softie on this, but I just can’t stand the stuffed animals everywhere.
Another option we use is when we find it discarded on the floor for multiple days (like they leave it in one place for days on end on the floor away from their room), it goes into a garbage bag in the garage. If it isn’t even asked for over a period of several weeks, we assume it isn’t wanted. And it goes.
We have garbage bags going in the garage all the time that are waiting for the next thrift store drop-off. My husband takes them out probably once a month. If I find clothes to small for our youngest son or youngest daughter, they go in the bag. Toys discarded and left just like the stuffed animal scenario above also go in the bag. We don’t have a lot of toys left, but even the ones they love–well if you can’t put it back where it goes, then you probably don’t want to keep it.
Controlling the clutter is an on-going task around here.