Dogs really like to dig. You'll have to train Fido to get him to stop. When you catch him in the act say "no." Then distract him with a toy. It won’t help to scold him after he's done. You need to be consistent when he’s digging, not afterward. Tip: Give him a sandbox where he can go to town. Bury some favorite toys and watch him have fun getting them out. Pile on the praise -- it will help him learn that he can dig all day in that spot.
Other animal parts: These may be good or bad depending on the source. When in doubt, ask your vet about the safety of a chew. As a general rule, safer animal part chews include aortas, tendon, gullet, and tripe. Ears are more controversial as they are closer to rawhide as far as digestibility goes (plus, pig ears especially tend to contain a lot of fat). Some animal horns will soften when chewed and fray into small pieces that are digestible, but these should be used with caution.
Puppy chewing is often caused by the fact that either their baby teeth are erupting, or they are being replaced by permanent teeth. The tiny, needle-like teeth erupt when your pooch is around 3 to 8 weeks old, and just when you get used to scratches from nipping, they start teething again. Dogs stop teething when they are around 4 to 6 months old when all of their milk teeth are replaced by adult ones.
There are many chews on the market today that can be considered safer for dogs because they are digestible and not too hard for teeth. It is important to remember that even large chunks from digestible chews can still cause GI upset or blockage. Always supervise your dog after giving it chews. If the dog seems to be swallowing large chunks, take the chew away. Furthermore, if the dog develops vomiting, diarrhea, or other signs of illness, see your vet right away.