Dont use the family cat. They hate it. And the blanket squiggles non stop and is hard to get to lay straight. I dont mix my fabrics because they wash differently? some might stretch out over time some will shrink, some need no heat, some are ok with heat .. I would use the non cottons for things like crafts, wall quilts, etc. I also however HATE using stretchy fabric (not good with it) and worse yet.. satins. or velvets. I love love love satin and velvet however I hate sewing with it. It MOVES!