Welcome, shell. I think there are "formulas" used to try and estimate weight at maturity but nothing really exact! Our Toto was 1 lb. 8 oz. when we bought her at 16 wks. Our breeder only allowed us to buy her because she would not reach 3 lbs. and couldn't be shown! Also, our vet kept telling us she wouldn't reach 3 lbs. ... the day she tipped the scales at 3 lbs. we all almost fainted!!
We were feeding our picky eater lots of "human" food cooked from a doggie cookbook and she was "chubby"! We got severly reprimended because of her tiny bone structure ... it could cause her joint problems when she is older! She is 16 months now and for a few months has held her weight of 4 lbs.!!! They weighed her 3 times to make sure there was no mistake!!
Since she is maintaining this weight, eating her "proper doggie food" ... we believe this is it for her!! Although, she was a "novelty" when she was really tiny, we are glad that she is at least this big because we are so terrified she will get injured ... 4 lbs. is a LOT sturdier!!
Besides, we just love her so much ... we wouldn't care if she grew to the size of a St. Bernard!!!
