Cedar chips in the dryer? I'm not sure that would be a good idea. I have made several dog pillows and dog beds. One of my favorite "stuffing" ideas is to use the foam egg carton mattress toppers cut to size. I buy these at garage/estate sales, sometimes thrift stores. I DO NOT place these in the dryer. If they are sewn inside the covering, I hang them to dry after machine washing; but usually I make the covering like a pillow case with an opening in the end or middle of the backside so that the covering can be washed and placed in the dryer and then air the insides in the sun to freshen.