<div><p>Every dog lover has a favorite breed. Whether it's because of their history, their unique look or the way they act, there's a breed out there for everyone.</p><p>But you may be surprised to learn your favorite type of dog didn't always look the way they do today. Sure, we realize that certain traits are bred in or out of a breed, but these are some drastic changes.</p><p>There are debates in the dog community over whether or not these changes are healthy. It's true some breeds have health problems, and the changes in these photos can be shocking. Whatever side of the argument you fall on, these before and after shots are pretty interesting.</p><p>Some of these photos are courtesy of Caen Elegans, who wrote a great <a href="https://dogbehaviorscience.wordpress.com/2012/09/29/100-years-of-breed-improvement/">blog post </a>about dogs and their history.</p><p></p><p><strong>1. Saint Bernard</strong></p><div><figure><amp-img src="https://www.shared.com/content/images/2017/03/St-Bernard.jpg" srcset="https://www.shared.com/content/images/2017/03/St-Bernard_GH_content_550px.jpg 550w" sizes="89vw" title="" alt="" height="9" width="16" layout="responsive"></amp-img><figcaption class="op-vertical-center"><cite>Dog Behavior Science</cite></figcaption></figure></div><p>Saint Bernards are famous for being rescue dogs, but the huge, fluffy version we keep as pets today can't get much work done.</p><p></p><p><!-- [invalid-shortcode] --></p><p></p><p><strong>2. Bulldog</strong></p><div><figure><amp-img src="https://www.shared.com/content/images/2017/03/Bulldog.jpg" srcset="https://www.shared.com/content/images/2017/03/Bulldog_GH_content_550px.jpg 550w" sizes="89vw" title="" alt="" height="9" width="16" layout="responsive"></amp-img><figcaption class="op-vertical-center"><cite>Biol1020</cite></figcaption></figure></div><p>This historical painting shows the changes bulldogs have gone through over hundreds of years. Today's dogs have bigger bodies, wrinkly faces, and the shocking underbite you see here.</p><p></p><p><strong>3. Bull Terrier</strong></p><div><figure><amp-img src="https://www.shared.com/content/images/2017/03/Bull-Terrier.jpg" srcset="https://www.shared.com/content/images/2017/03/Bull-Terrier_GH_content_550px.jpg 550w, https://www.shared.com/content/images/2017/03/Bull-Terrier_GH_content_650px.jpg 650w" sizes="89vw" title="" alt="" height="9" width="16" layout="responsive"></amp-img><figcaption class="op-vertical-center"><cite>Dog Behavior Science</cite></figcaption></figure></div><p>This terrier's unusually shaped skull is a mutation, and their bodies have become stockier.</p><p></p><p><strong>4. Chow Chow</strong></p><div><figure><amp-img src="https://www.shared.com/content/images/2017/03/Chow.jpg" srcset="https://www.shared.com/content/images/2017/03/Chow_GH_content_550px.jpg 550w, https://www.shared.com/content/images/2017/03/Chow_GH_content_650px.jpg 650w" sizes="89vw" title="" alt="" height="9" width="16" layout="responsive"></amp-img><figcaption class="op-vertical-center"><cite>Wikimedia</cite></figcaption></figure></div><p>These Chinese dogs have been popular for thousands of years, but when you compare a modern dog to its ancestor from 1901 you can see how much they changed in the last century.</p><p></p><p><!-- [invalid-shortcode] --></p><p></p><p><strong>6. Rottweiler</strong></p><div><figure><amp-img src="https://www.shared.com/content/images/2017/03/Rottweiler.jpg" title="" alt="" height="9" width="16" layout="responsive"></amp-img><figcaption class="op-vertical-center"><cite>Starpulse</cite></figcaption></figure></div><p>Historical rottweiler's look totally backwards, with their small tails and long noses. </p><p></p><p><strong>7. German Shepherd</strong></p><div><figure><amp-img src="https://www.shared.com/content/images/2017/03/German-Shepherd.jpg" srcset="https://www.shared.com/content/images/2017/03/German-Shepherd_GH_content_550px.jpg 550w" sizes="89vw" title="" alt="" height="9" width="16" layout="responsive"></amp-img><figcaption class="op-vertical-center"><cite>Dog Behavior Science</cite></figcaption></figure></div><p>Another working dog that has changed as it became a house pet. Their impressive wide stance gives lots of dogs hip pain.</p><p></p><p><strong>8. Pug</strong></p><div><figure><amp-img src="https://www.shared.com/content/images/2017/03/Pug-1.PNG" srcset="https://www.shared.com/content/images/2017/03/Pug-1_GH_content_550px.PNG 550w, https://www.shared.com/content/images/2017/03/Pug-1_GH_content_650px.PNG 650w, https://www.shared.com/content/images/2017/03/Pug-1_GH_content_750px.PNG 750w, https://www.shared.com/content/images/2017/03/Pug-1_GH_content_850px.PNG 850w" sizes="89vw" title="" alt="" height="9" width="16" layout="responsive"></amp-img><figcaption class="op-vertical-center"><cite>Dog Behavior Science</cite></figcaption></figure></div><p>The pug's flat, upturned nose causes lots of problems for these chubby little rascals, but their owners can't resist them.</p><p></p><p><!-- [invalid-shortcode] --></p><p></p><p><strong>9. Basset Hound</strong></p><div><figure><amp-img src="https://www.shared.com/content/images/2017/03/Basset-Hound.jpg" srcset="https://www.shared.com/content/images/2017/03/Basset-Hound_GH_content_550px.jpg 550w" sizes="89vw" title="" alt="" height="9" width="16" layout="responsive"></amp-img><figcaption class="op-vertical-center"><cite>Dog Behavior Science</cite></figcaption></figure></div><p>Along with getting "taller" through the years, these dogs have gained their signature "droopy" faces.</p><p></p><p><strong>10. Neapolitan Mastiff</strong></p><div><figure><amp-img src="https://www.shared.com/content/images/2017/03/Neapolitan-2.jpg" srcset="https://www.shared.com/content/images/2017/03/Neapolitan-2_GH_content_550px.jpg 550w" sizes="89vw" title="" alt="" height="9" width="16" layout="responsive"></amp-img><figcaption class="op-vertical-center"><cite>Retrieverman</cite></figcaption></figure></div><p>Like the basset hound, these guard dogs have developed extra skin around their face that gives them a "droopy" look.</p><p></p><p><strong>Share this post with someone you know!</strong></p><p></p><p><!-- [invalid-shortcode] --></p></div>