Abnormally small kitten

One of my foster kittens is 14 weeks old (She opened her eyes two days after I got her, so was estimated at 2 weeks old). She is TINY. She weighs 15 ounces, and thats mainly cause shes a chunk! (She will eat anything). She is the size of a 4 week old kitten, and is almost 4 months old! She was a bottle baby. I have bottle fed plenty of kittens before, one in particular who was a small kitten like her, but he started getting much larger at 2 months. She has gained maybe a couple ounces the past few weeks....

I am just thinking she may not grow much more! But who knows, she could have a growth spurt.

Here are some pictures it wouldn't let me add before...







Not the best, she wasn't too enthusiastic and the lighting was poor.:

Don't despair!
I had a sickly bottle baby that was the size of a 4 week old at 4 months.
She's a very healthy, and very HUGE (not fat!) 18 pound adult now.

She does look very very small.
I will say that a mother I am fostering is 4 3/4 pounds and she is 2. She may be a very small cat as an adult.