Rita-Preston Puppy Weights - units are pounds and ounces. (example 1 pound = 16 ounces)
Weights more than 16 ounces are listed at "pounds - ounces" e.g 27 ounces is listed as "1 - 11.5"
The 'Gain (O)' row is the weight gain, in ounces, since birth.
The 'Gain (P)' row is the weight gain, in pounds, since birth.