Leg may be twisted or hang at an unnatural angle. No weight put on leg.  May display symptoms of shock (listless, no appetite and cold to the touch).  A grating sound may be felt/heard when the leg is (gently) flexed.

Possible Causes

Accident or trauma are the usual causes.  Unsuitable wheels and poorly constructed cages can be a problem too.  Beware of add-on, shop-bought hay racks, ill-fitting shelves and some types of hanging toys too!!!  Veterinary treatment is essential.