It can be providing you buy it from the reputable supply, Make sure it is fresh and doesn’t have any unusual odors or discoloration to it. The colour ought to be pink rather than gray with a certain amount of a bounce when touched, it shouldn't be mushy at all. https://friselvasa.com/product/wholesale-frozen-pig-rosary-bones-%e5%bf%b5%e7%8f%a0%e9%aa%a8%e5%a4%b4-friselva/