My guild does "dog and cat cuddles" - if you have fabric to get rid of you can donate it to that group and they'll pass it back out to other members who want to sew cuddles for the local shelters, and they also collect up and donate the cuddles when they're done. If/when I ever get some spare time I plan on making a few out of my stash and donating them too. I think they have an info sheet that outlines dimensions & appropriate materials/manufacturing guidelines but I haven't grabbed one yet.