Here's why:
* Individual Variation: Just like humans, dogs of the same breed come in different sizes. Some Rat Terriers are naturally smaller than others.
* Feeding and Exercise: A puppy's weight is heavily influenced by their diet and activity level. A puppy that eats more and is more active will likely weigh more than a puppy that eats less and is less active.
* Health Factors: Health issues can also impact a puppy's weight.
What to do instead:
* Talk to your vet: Your vet can give you the best advice on a healthy weight range for your specific Rat Terrier puppy.
* Use online resources: There are many reputable websites that provide information on average weight ranges for Rat Terriers at different ages. Be sure to use reliable sources.
* Monitor your puppy's growth: Keep track of your puppy's weight and growth over time. If you notice any significant changes, consult with your vet.
Remember, a healthy weight is more important than a specific number.