Welcome to YT!! Congrats on your baby girl! I have 2 boys that are 4 & 6. I know it's boys vs girls, but Woody didn't get neutered until he was about 1 1/2, but chipped as soon as I got him, my heart broke
Bogie was neutered as soon as we could (didn't want to deal with marking again) and was chipped while in surgery. As for treats, all ideas already posted are great - I like Charlie Bears, very light and airy and small! The boys think watermellon is the best though. With the biting and nibbling, we just say "Ooowww" in a calm but whiny voice, they stop immediatly. It has taken time, but it works for us. Good luck and wishes for many year of happiness!