I wash and dry all my dog quilts by machine... I have three dogs so that is very often! I use either Warm and Natural or poly battings for my dog and couch quilts that get very frequent launderings. My "good" or heirloom type quilts get 100% cotton batting and get hand or machine quilted. They go into the washer and dryer as soon as they are finished so the batting will shrink to get the vintage look and it makes them so cuddly. Those get quilted no farther apart than two inches, and seldom get washed. My dog quilts wear on the outside long before they wear on the inside. I don't think any 100% cotton batting should be tied as opposed to closely quilted. Its not the fault of the manufacture or the dog. IMHO, one can't beat Warm and Natural for pet or baby quilts. Hope this helps.