If you want to give her new hides, change them over one at a time. See if she likes the new one. If she starts using the new one, switch the other one out.

I had 2 hides, one too big and one he was barely fitting in for Paradox. He definitely did not like the too-big hide, hardly used it. I got 2 new hides that were inbetween the two. He took right to them no problem. But I did switch them out one at a time.