Here's why:
* Individual Variation: Like humans, dogs come in different sizes. Even within a breed, there's natural variation in growth rate.
* Diet and Exercise: A puppy's diet and exercise levels significantly impact their growth and weight. A well-nourished puppy with plenty of activity will likely be heavier than a puppy with less food and exercise.
* Genetics: Some Mastiff puppies naturally grow faster than others.
Instead of a specific number, here's a general guideline:
* 5-month-old English Mastiffs typically weigh between 40-60 pounds.
Important Note: It's best to consult your veterinarian for specific weight guidelines for your puppy. They can consider individual factors and offer advice tailored to your Mastiff's needs.