Bootstrap slider image getting stretched in responsive view

is there any solution for bootstrap slider image stretch problem for responsive view ? I don't want to set height default

http://getbootstrap.com/examples/carousel/

I tried with the above slider which is an default slider given in twitter bootstrap. when I included images in that slider it was stretching. If anyone faced this issue let me know the solution

I'm not sure if you already looking for this, but Bootstrap also provides a class for responsive images. Just added it to the img-tag.

HTML

<div class="slider">
  <div id="carousel-example-generic" class="carousel slide" data-ride="carousel">
    <!-- Indicators -->
    <ol class="carousel-indicators">
      <li data-target="#carousel-example-generic" data-slide-to="0" class="active"></li>
      <li data-target="#carousel-example-generic" data-slide-to="1"></li>
      <li data-target="#carousel-example-generic" data-slide-to="2"></li>
    </ol>
    <!-- Wrapper for slides -->
    <div class="carousel-inner">
      <div class="item active">
        <img src="http://dreamatico.com/data_images/cat/cat-6.jpg"  class="img-responsive" alt="Slider 1">
        <div class="carousel-caption">
        <h3>Caption Text</h3>
      </div>
   </div>
   <div class="item">
     <img src="http://dreamatico.com/data_images/cat/cat-6.jpg"  class="img-responsive" alt="Slider 2">
     <div class="carousel-caption">
       <h3>Caption Text</h3>
     </div>
   </div>
  <div class="item">
    <img src="http://dreamatico.com/data_images/cat/cat-6.jpg"  class="img-responsive" alt="Slider 3">
    <div class="carousel-caption">
      <h3>Caption Text</h3>
    </div>
  </div>
  <!-- Controls -->
  <a class="left carousel-control" href="#carousel-example-generic" role="button" data-slide="prev">
    <span class="glyphicon glyphicon-chevron-left"></span>
  </a>
  <a class="right carousel-control" href="#carousel-example-generic" role="button" data-slide="next">
    <span class="glyphicon glyphicon-chevron-right"></span>
  </a>
  </div> <!-- Carousel -->
</div>

JavaScript

$('.carousel').carousel({
    interval: 3000
})

See it also on jsfiddle.