LOL Something similar to your story happened to us. Jer took Suri to be weighed at a vets office. She was about a pound and a half the day before but we still wanted to weigh her...the vet tech tried to convince Jer that 10oz = a pound. She tried to tell him she weighed like 2 pounds. Now we stick to weighing them at the post office.
I was so confused how such a tiny thing could gain over half a pound in half a day...