We buy the 12" ones for my boys because they chew through the 6" ones in like an hour. I have bigger sized boys (8 and 14 lbs) though.
I've never noticed their gums getting sore or bleeding though and they'll chew on their bully sticks for HOURS at a time.
__________________ ~*~ Chip ~*~ Smokey ~*~
My heart is wrapped around their little paws
Karley Marissa born 1/20/12 weighing 8 lbs 11 oz and 21.5 inches long
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