I am a bit wary of rawhide because it can become a choking hazard.Same here, my friend lost one of her dogs due to a cow ear chew, the dog was off colour, not eating, high temp, lethargic, no amount of investigation by the vet could find the cause, the poor dog was eventually pts as he was deteriorating by the day, my friend gave permission for an autopsy as the vet was completely stumped, he found, neatly wrapped inside the dogs oesophagus, a piece of decomposing cow ear, being soft tissue it hadn't shown up on any of the x rays, and had, up until the autopsy been invisible to all examinations as it was tucked well down out of sight.