Boston Terriers need two medium-portion meals in a day. You can also give them a large portion in the breakfast, and then a small portion in late evenings. The quantity and portion of the food required for Boston Terriers may vary depending on their body weight and size. Feeding them more than required will cause obesity in these dogs. So you'll have to monitor their weight from time to time. Puppies or small-sized Boston Terriers may sometimes only need 1 meal per day.