Caring for your Boston Terrier requires multiple things: good food, grooming, time devoted to him/her, daily exercise, health upkeep, and your love and attention. You just need to make sure you do all the right things that’s good for him/her, and your dog will be happy and healthy for years to come. Share this on Facebook K. Apr 19, · By 6 months you will want to start reducing the amount of food you feed your Boston Terrier to fit an adult Boston Terrier feeding plan (about 2 meals a day). Make it a routine, feeding your Boston Terrier around the same times every day. You should be feeding your Boston Terrier 1/2- 1 1/2 cups of food a day, split between the two meals.