how to separate legs and other things frm the model.Does it means dividing the model into parts that makes the parts behave like an different object.Is the operation is like
1. selecting the face that i want to separate
2. Mesh>Extract

how to lock transformation of any vertex or edge of any object?(yes... vertex or edge of any object not the object itself.Cause i am working with the object and i want to lock the transformation of certain vertics so when i will be sculpting then they will only move in y direction only.)

im also facing some problem with the model.When i tried to turn the model to sub-d frm poly then it says "One or more edges is nonmanifold.
".But when i run the clean up under the mesh menu then it distorts the paw very much!wht im supposed to do now.....