Responsive images with multiple fields I'm working on a site that has (and must have) three image fields for out three breakpoints. We could call them field_img_mobile, field_img_tablet and field_img_desktop

Is there a way (a module?) that could load the image field corresponding to the breakpoint?
I think Picture module help you to solve your query. 

Please check Responsive Images in Drupal with the Picture Module.

OR you can try these also :


Flickr
Responsive images and styles