Hope - our cat makes a strange noise with her toys

My cat is a rescue. She often finds one on her toys and carries it in her mouth howling the whole time. At some point she might put it down and hover over as she cries. What is that all about? I keep thinking she thinks its food she has caught, but what is all the crying about?
Hope

Answer by Kate
Cats will often treat their toys like real prey so it could be the noise she is making is the noise cats make when they are hunting live prey. I wouldn't worry, in fact it is a good thing as she is able to express her natural instincts.