antonshevchuk

Additional – you can use  second time (for cut full article in full RSS). 
Options available on Settings/Reading page

(a) RSS More

This is a plugin that allows you to additionally export RSS with the full text of the articles. Your reader can now select what RSS he wants to read h …

MailerLite

This plugin automatically adds featured images of your posts into the RSS feed.
Features:
<ul>
<li>Automatically adds featured images of your posts into the RSS feed</li>
<li>Choose from all available image sizes</li>
<li>Choose from multiple image alignment options</li>
</ul>

Featured Image in RSS Feed by MailerLite

This plugin automatically adds featured images of your posts into the RSS feed.

(a) RSS More vs Featured Image in RSS Feed by MailerLite