These Zanies mice are very small and have short fur.  I had given my cat some larger mice before and she lost them all, so I thought sixty mice would be a better buy.  Problem is, I gave her one and she hasn't lost it for lack of interest.  Yes, she plays with it, but she doesn't play with it nearly as much as she played with the larger furrier ones.  I'm afraid I now have too many fur mice on my hands.