Sounds like Tramp! Unless it's something that is harmful to him, I don't worry about it anymore (he's 5 1/2 months now)... if he wants to proudly carry a maple leaf around chomping on it, so be it. When he gets a rock, he generally drops it soon after. Most dogs eat some grass if given the chance. Tramp loves getting ahold of a large tree branch to prance around with then gnaw on (any big sticks for Marley around?). I don't think Tramp really swallows much.
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