title: How to create a solr query that searches by multiple keywords in all fields
body: <p>I want to perform a solr query on all fields for multiple keywords. For example, I want to search for the word "dog" AND the word "cat".</p>
  
  <p>So far, I've tried to do something like this:</p>
  
  <pre><code>q=dog cat
  </code></pre>
  
  <p>or something like:</p>
  
  <pre><code>q=dog,cat
  </code></pre>
  
  <p>However, I think my queries are actually doing an OR instead of an AND.</p>