How big should a Boston terrier be at 12 weeks old?

It's tricky to give an exact weight for a Boston Terrier at 12 weeks old because their growth can vary. However, they are typically considered medium-sized dogs, and by this age, they should be showing good weight gain and starting to fill out.

Here are some general guidelines:

* Male: 12-15 pounds

* Female: 10-13 pounds

Remember:

* These are just averages, and your Boston Terrier may be slightly larger or smaller.

* It's essential to consult with your veterinarian for individual growth milestones and to ensure your puppy is growing healthily.

* If your puppy is significantly under or overweight, your vet can help you adjust their diet and exercise plan.

Don't hesitate to ask your vet any questions you have about your puppy's growth and development. They are your best resource for ensuring your Boston Terrier is healthy and happy!