Need help for my 2 month old Mini Pinscher.?

Just keep in touch with your vet. They will give you good sound advice for your dog. Since your vet is the one who has contact with you and little Britney, he/she will be best able to advise you on all these questions. Basic rule of thumb for feeding a a puppy her age is 3 times each day, feed amount recommended by vet. Clean water should be available at all times. Sounds like you are going to be a great dog owner....keep it up and best wishes.