Both of my girls have non-silky hair. The hair on their head grows SO slow! Do any of you have this problem? Here's Juju (Betty ran and hid

)
1-Juju sporting her 'sun visor'
2- Quit takin' my pitcha!!
3-Half-way top knot (which she managed to take out 30 seconds later).
Juju is 5 1/2 months old, but Betty is 10 months old and STILL has short hair on top. Does it ever grow?! Thanks for any input!