How much do you think a 13 week old puppy should weigh? Mia is a big eater. She will eat all of her food and then go directly and start eating Harry's if I let her. I usually let her eat first and then have to crate her while he eats so she won't eat all his. She will also growl and hoard food from him so they just cannot be fed at the same time. She does NOT growl at me around food so that's just between them. Anyway I did the stand on the scale with her today and she weighs a little over 20 pounds. Does this sound right? Harry is full grown and this summer his weight was 46 pounds. I think he really should be closer to 50 and I think he's eating better now that Mia is around to "compete" for food so he might be closer to that. I was curious about puppy weight at this age.