Coco does look a little 'fluffy' to me, too. She reminds me of my Heidi. Heidi was right at 3 pounds when I had her spayed at 1 year old but now she's a little over 4 pounds
. I feed her so little that I just won't feed her any less.
Coco is also like my Heidi in that she looks to be cobby-bodied. I think any extra weight shows more on the short- bodied dogs than one with a little more loin.