/**
  * Update the specified resource in storage.
  *
  * @param  int $id
  * @return Response
  */
 public function update($id, Request $request)
 {
     $this->validate($request, ['name' => 'required']);
     $animal = Animal::findOrFail($id);
     $medicationIds = $request->input('medication_ids');
     if (count($medicationIds)) {
         $animal->medications()->sync($medicationIds);
     } else {
         $animal->medications()->detach();
     }
     $animal->update($request->all());
     alert()->success('', 'Animal successfully updated!');
     return redirect('animal');
 }