My thought here is these dogs must have been left for a length of time to chew these rope toys and ingest the rope pieces. I doubt anyone who would see this would allow them to eat the string.
You need to supervise any toy your dog plays with. if I put Moolah in her crate I either give her no toy at all or strictly a nylabone that i know she cant harm herself on...Just my thoughts....
I'm getting rid of mine right now!