I agree with the buy a small bag at first. I learned this the hard way with my cat!!
As for toys, I would suggest a knuckle bone, I guess that's what it's called, like the one pictured here with Zoee. She loves it and it has lasted almost two years so far. There are barely any teeth marks in it and it costs less than $10. She chews and chews on that thing and all it does is squeak from her teeth rubbing on the rubber. I got hers at Petsmart.

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Good Luck, and I hope Savannah gets well and stays well!!