Attached Link: http://www.wavsite.com/sounds/lionking/lion09.wav

Sharky looks like you parented the hair to the Horse, Try this first when you parent the hair to the Horse again click inherit parent bends, That might fix the problem, If yoiu already have that checked of try doing it unchecked. If they both do not work put your Horse in a default pose and export it to anothoer 3d program, That allows you to deconstruct the parts, Save the parts with the hair on them then imort them into poser and replace the original neck parts on your Horse and it's tail, Then parent the last piece to the head. I Think mover can be used afterwards.