I had a small crate with a zipper and I stuck my hand through the zipper; this helped quit a bit. Also, I had taken 6 receiving blankets to his breeders and had her rub each one on mama and herself, as one would get soiled, I'd wash it and put it back in the bag with the others, so he had their sent for a long time. There are certain toys you can buy that have the mother heartbeat and many people say they help their dogs.
Comfort Pal - Ultra-Soft Plush Black/White Puppy with Digital Mother's Heartbeat