I have been looking at least prototyping in TPU 3D printed dog toys.
I’d be very concerned about the dog toys breaking apart and causing the dog harm.
I think non-used prototypes would be fine, but nothing that would actually go near the dog
I see your point about parts breaking apart being a concern.
How familiar are you with TPU? It’s quite durable and robust. It’s a plastic currently used in many dog toys. Between that and Part of me feels like TPU being a soft plastic that would minimize risk.
Pretty familiar, I also use it for prototyping. It’s an awesome material, but FDM is no match for a dogs teeth.
I wouldn’t want to take the risk, peraonally, but I guess it comes down to your level of risk tolerance and if you’re absolutely confident it won’t harm your pet