It could be a number of reasons. Fleas is the first thing that comes to mind. Stress will do it too. Or if the dogs anal glands are impacted that will do it too. Unfortunatly that last one requires a vet.
they are scratching themselves that hard because of fleas.
Yes, A dog could vomet after eating a chew toy
Get the dog some good chew toys. Dogs need to chew.
rice
You will poison
A Bone
A Bone
No, but chow is.
It's awful to imagine it but if a dog is in enough pain and distress it might be driven to chew off a toe.
No They Will Die.
because they itch
being friendly
obama on his knees