"Dog toy materials Question: Hi - Do you know if blue jean material will harm a dog if used for making dog toys? I know there are colors/dyes used in the manufacturing process of jeans. I have so many old worn jeans and I’d like to recycle them in some way. thanks! Suzanne Answer: Thank you for your question, Suzanne. We have not had any reports of blue jeans used in dog toys causing harm, and times, when we have used old jeans for tug-of-war, do not seem to have hurt our dogs. However, there may be dogs who are hypersensitive to the dyes - you may wish to call a local veterinarian’s office and ask. A bigger danger would be if a dog chewed the jeans into pieces and swallowed them, causing choking or some kind of obstruction. That is why we always recommend supervising your dog closely when it comes to toys made of materials that can be chewed to bits and using them more for fetch or tug of war purposes than chew devices. Jo" Source - make-and-build-dog-stuff.com/questions-about-materials-for-dog-toys.html