There is a fine line between being too easy to chew up and swallow, and being too hard, possibly damaging the teeth. Many commercial chew toys are far too hard and can break the chewing teeth. There are two guidelines we recommend using:
● If you cannot make an indentation in it with a fingernail, the treat or toy is too hard.
● If it would hurt to hit yourself in the knee with it, the treat or toy is too hard.
Pets who are prone to quickly swallowing large pieces of chew toys should be monitored during their use, to avoid an obstruction.