I would defintely recommend martingale collars, specifically the Lupine brand ones..they are fairly inexpensive and have a 100% guarantee, meaning if your dogs eats/chews or in any way breaks it they will replace, no questions asked..we have used that policy once, when Otis decided to eat his…..
As far as food..I have used Blue Buffalo, and like it lots, especially since it is easier to find. I also like EVO, Canidae and The Honest Kitchen..My dogs are on RAW so we use the Honest Kitchen or Sojos for mix ins, even when they were puppies.
Good luck and how exciting..did you mention where you got her? A lot of our dogs are related so it is always fun to know.