My dog progressed as he grew to being able to bite and tug on harder tugs. French LInen was a good start. I have heard firehose can be hard on teeth. My french linen tugs have lasted well, too.
NAPWDA Certified Cadaver Dog
Waiting at the Bridge (italics
=GSDs) (hemangiosarcoma=blue):Grim , Cyra, Toby
, Rainbow, Linus, Oscar
, Arlo & Waggles