I did sort of with my two too...
Emma:
8 weeks-2.2 lbs
10 weeks-2.6 lbs
13 weeks-3 lbs (plus some ounces)
5 months-4.5 lbs
6.5 months-5 lbs
8 months-5.5 lbs
12 months-7.2 lbs (she was porky!)
15 months-6.5 lbs (perfect!)
18 months (last week)-6.0 lbs (too skinny?)
Milli:
11 weeks-3.4 lbs (she was pretty rolly-polly!)
12 weeks-3.2 lbs
15 weeks-3.1 lbs
18 weeks-3.0 lbs
5.5 months-3.5 lbs
7 months-3.9 lbs
10.5 months(yesterday)-4 lbs!!!
We joke that Emma is the "value size" with 33% more yorkie to love!