You didn't mention the age of the dogs in question. There will be variation in size depending on the genetic makeup and sibling dogs don't necessarily look anymore alike than sibling humans. I'm 5'8", light blonde and slender. My sister is 5'1", with black hair and dark complection and on the heavy side. Yes, we have the same parents. Nearly six pounds is a very normal weight for a Yorkie approaching maturity and many go over that. Some tiny ones are half that weight. Are you sure you have a problem?

Thanks for your response. Both of the Yorkies are 5 years of age and it just seems to have one gain so much at a short period of time seems abnormal. Perhaps there is nothing to be worried about but I thought I would throw out the question anyway. Thanks again!

Duane

Sounds like someone is getting food elsewhere.