Rocco still wears the collar provided by the breeder which is adjustable. After a few weeks you will definitey want to switch to a harness fo walks instead. As far as food goes, there are so many options out there but many (including myself) have had success with Fromm's. Maybe you can start on their puppy gold formula. Be sure to check out the Dog Food Ratings as well it's in one of the stickies. Do you happen to know what the breeder is feeding them now? can imagine the excitement and anxiety you must be feeling rght now! Welcome and congrats!!!