STM with a 7.5 month old LO. I stayed at home with her for the first 5 months, during which she gained an average of 8 - 10 oz. per week. At all her well-visit appointments (birth, 1 week, 1 mo, 2 mo, 3 mo, and 6 mo) she has been in the 95th percentile.
I returned to work when she was 5 months old. She is EBF and started solids around 6 months (volume-wise, she has about 1 Tablespoon at lunch and 1 Tablespoon at dinner). She was introduced to bottles when she was a few days old (forced to supplement); but ever since 2 months old, she refuses all bottles most days (we have tried Tommee Tippee, Playtex Drop-Ins, Momma, Lanisoh, Avent, NUK, and more). Approx. once a week, one time out of the ten times they offer her, she will take 2 oz. of pumped fresh breast milk.
For the past 2.5 months since I returned to work, she has gained an average of 1 - 2 oz. per week, for a total of less than 1 lb. Looking at the growth curves, I think this means she is falling off the curves, down to 75th percentile. My pediatrician has always emphasized that the important thing is not how much a baby gains, but rather that they maintain their growth curve (i.e. if they were born at the 25th percentile, as long as they stay on that track, their growth is normal, even if they remain petite).
I am semi-dreading our 9 month appointment, because I suspect they will comment about her lack of weight gain. Do I need to be concerned? She simply refuses to drink anything from bottles during the 9 hours we are apart. Should I try sippy cups? Straw cups? Increase solid foods? Stick my head in the sand and wait for the pediatricians to chastise me at our next visit?

TTC #1 since 2007. Dx: Unexplained infertility. 4 IUIs in 2008 = BFN. IVF #1 07/09. DD #1 born April 2010 (40w5d).
TTC #2 since 2011. Dx: Endometriosis and hypothyroidism. 2 FETs in 2012, BFP 6/12 but m/c @ 7 weeks. IVF #2 06/13. DD #2 born March 2014 (40w1d).


Re: Need input: 8 mo old, barely gaining weight
My daughter fell off the chart around 9 months and it's been a huge struggle with lots of tests and feeding therapy and specialists. But she is still happy and healthy 2.5 year old, she's just a tiny 20lb 2.5 year old. And it took a while/a few visits for her pedi to get concerned. So even if they mention the little gain at the 9 month appointment they may just suggest higher fat foods and more protein and such. You could try that now if it makes you feel better.
Avocado
Egg yolks
Adding real butter to lots of foods
Full fat yogurt
Ice cream
There are more but my brain is fried right now
As long as you feel she is being satisfied with her meals and milk intake and her amount of poop and pee seem adequate I wouldn't worry too much.
2010: Infertility
October 2015: missed miscarriage #2 at 11 weeks (trisomy 22)
TTC #1 since 2007. Dx: Unexplained infertility. 4 IUIs in 2008 = BFN. IVF #1 07/09. DD #1 born April 2010 (40w5d).
TTC #2 since 2011. Dx: Endometriosis and hypothyroidism. 2 FETs in 2012, BFP 6/12 but m/c @ 7 weeks. IVF #2 06/13. DD #2 born March 2014 (40w1d).
TTC #1 since 2007. Dx: Unexplained infertility. 4 IUIs in 2008 = BFN. IVF #1 07/09. DD #1 born April 2010 (40w5d).
TTC #2 since 2011. Dx: Endometriosis and hypothyroidism. 2 FETs in 2012, BFP 6/12 but m/c @ 7 weeks. IVF #2 06/13. DD #2 born March 2014 (40w1d).
Does she nurse more at night to make up what she misses during the day?
TTC #1 since 2007. Dx: Unexplained infertility. 4 IUIs in 2008 = BFN. IVF #1 07/09. DD #1 born April 2010 (40w5d).
TTC #2 since 2011. Dx: Endometriosis and hypothyroidism. 2 FETs in 2012, BFP 6/12 but m/c @ 7 weeks. IVF #2 06/13. DD #2 born March 2014 (40w1d).
TTC #1 since 2007. Dx: Unexplained infertility. 4 IUIs in 2008 = BFN. IVF #1 07/09. DD #1 born April 2010 (40w5d).
TTC #2 since 2011. Dx: Endometriosis and hypothyroidism. 2 FETs in 2012, BFP 6/12 but m/c @ 7 weeks. IVF #2 06/13. DD #2 born March 2014 (40w1d).