Daughters 4 months and weigh 12lbs 11 ounces how can i help her gain a pound or 2 in 2 weeks i've been feeding her pablum how much can she eat (pab)?

That weight is above: 25th%ile for her age, which is fine if she's been growing along that curve. Add solids when she's 14-16 lbs., 4-6 months old, taking > 32 ounces/day or nursing more than 10-12 times/day & has enough upper body control to face the spoon when hungry & turn away when full. Review her growth curve, intake & development with her pediatrician. See HealthyChildren.org & firststeps.org.