I use my clippings and small trimming pieces or those pieces too small for projects for the stuffing for dog beds for our local shelter. The dogs and yes, cats, don't mind lumpy they just like to be off the floor or the cage wire and these can be tossed in the washer if needed or just tossed out if too soiled.
This is our quilt service project and we have made dozens of them just from out scraps of batting or small fabric scraps.