After changing one of my enemies by putting in a soldier mesh, he floats above the ground. I had to scale down the original mesh because it was too big.
I also noticed at this point that some of the other enemies are also floating, some in the crouched position.
Finally, all the other enemies still chase me around, but the one with the new solider mesh does not.
I solved part of this problem. I scaled down the parent enemy object that stored the new mesh, skeleton and everything else like I scaled some of the other enemies. The soldier now chases me around like I want him to. However, the enemies still float and crouch.