Is 8 mos old too old to bond?

Question
We adopted an 8 month old German Shepherd Longhair female.  Best guess is she was neglected by an otherwise ok family (husband didn't care for dogs, wife, whose dog she was, was at work all the time).  She barks at and chases everything.  We have an 8 month old male GSD we've had since 8 weeks who is great and is very bonded to us, but tends to now run off with the female a lot rather than stay around us.  Here's our questions:
- Is it too late for the female to bond with our family like the male?  She is gentle but out on our land tends to run off where the male wants more to be with us.  
- If she can still bond with us, how long should it take?  It's been five weeks and we see very little signs of bonding.  Mostly she's glad to have some attention.  How long should it take to see signs of bonding/responding to us?
- Will her bad behaviors (barking, chasing things, not listenting to commands) rub off on the male?  He seems to be the dominant one in the relationship, but we're worried about her influencing him.
- She is responsive to training when by herself (and is the typical intelligent shepherd) but doesn't respond at all outside of training times.  Will this change?

All help is greatly appreciated.

Answer
Early socilization is very important and much of a dogs personality is set by 12 weeks.  Changes thereafter come slowly.  At 8 months, she should have no problems bonding to you if she was properly socialized to people.  If she didn't have the attention she should have had from the day she was born, she will be slow to bond with people.  I can give you some things meant for younger dogs. Doing what is still possible should help.  

''Elevation for small puppies: Sit on the floor and gently put your hands around your pup's middle, below his front legs, and lift him up. He is facing you. Hold him for 15 seconds. Repeat until he no longer struggles. If he is past 10-12 weeks, lift his front feet off the ground, but don't pick him up.

Cradling for small puppies: Hold your puppy gently on his back, as you would cradle a small baby. If he struggles, hold him firmly until he quiets for 10-15 seconds. With larger pups, you can do this as your sit on the floor, with your pup between your legs.

Quiet lying down: Place your pup on the floor on his side, with all 4 legs pointing away from you. Use your hands on his neck/shoulder area and middle, to hold him in this position. When he is quiet, praise him. Lengthen the time that you keep him quietly in this position. When he accepts this position well, handle his paws and muzzle, while keeping him quiet.''

The quotes mean this isn't my original work. It is copied from my Puppy Raising Manual. I have long used these or minor variations of them, and they are very effective. You may want to give him a belly rub while he is on his back too. Helps bonding. There is a big difference between him rolling over and demanding a belly rub, and you choosing a time to roll him over and rub his belly. The latter cements your place as pack leader.

She may have deep seated problems requiring a private trainer or behaviorist.