my girl only gains 1-2 oz per week too....she eats like a horse and gets lots of treats throughout the day....she just must have a fast metabolism
... she is never lethargic so i do not worry about her weight too much anymore (i have had her since the end of december and she has only gained about 7 oz)
my boy actually has not gained anything in WEEKS but he was soooooooooo chubby before (seriously he was way off the growth charts LOL) and i think he is growing into his chubbiness
