chocolate, grapes- That is the first answer someone gave. I don't think those are actually undigestible, but they are poisonous to dogs. Among other POISONS are garlic and xylitol. As for undigestible, dogs cannot digest rawhide, and I'm 99% sure they can't digest bones.
Rawhide is the uncured hides of animals.
The rawhide was obtained from cattle.
Rawhide is made from the skin of animals, usually cow. The skin is split into inner and outer layers. The tough outer layer is used for leather shoes, garments, and upholstery, while the softer inner layer is cut and formed into different shapes for dog chews.
Rawhide was in the Key of A.
Rawhide Kid was created in 1960.
Visalia Rawhide was created in 1946.
The Rawhide Terror was created in 1934.
To stain rawhide, first clean and wet the rawhide, then apply leather dye or oil-based stain using a sponge or cloth. Allow the rawhide to dry completely before applying a sealant or finish to protect the stain and the rawhide.
The duration of The Rawhide Terror is 3120.0 seconds.
Rawhide Boys Ranch was created in 1965.
The ISBN of Rawhide Kid is 0-7851-2684-8.