Extra pounds place an excess burden on bones and joints and can make arthritis problems worse. Overweight dogs are less able to exercise and play comfortably.
Put your puppy outside first thing in the morning, after meals and last thing at night. If you do not have a garden use a litter tray.
Use your puppy’s name when calling it, praise it when it responds. Firstly get your puppy used to wearing a collar by putting it on for short periods of time.