Small goats, any chance they will catch up in growth?

[Sanhestar]

they will most likely catch up but it might take them a year more than a well fed goat. So don't expect to be able to pack them before they are 4, maybe even 5 years old. If you're on a timetable, look for other animals.

Feed them well, worm them, maybe even have bloodwork done to figure out if they are lacking certain nutrients.

Also don't expect them to grow into giants.

Years ago I took as a rescue a goat that was weighing about 20-25 lbs at 6 months. He grew enough to become a packer but was never among the biggest of our goats. Took him five years, though.

BTW - it's not size, it's heart that makes a packer. As long as they are big enough that you can fit a saddle, you can pack them.