You can easily do this using Custom RSS Feed method very well explained by Joost ( For reference: http://yoast.com/custom-rss-feeds-wordpress/ ). Using this way, you can display any of the fields either custom field value or featured image.
Related Posts:
- Add filter menu to admin list of posts (of custom type) to filter posts by custom field values
- How to show page content in feed?
- Is there any action filter/hook for validating a custom field before publishing the post?
- Filter WP_Query for posts having a certain meta-value
- Apply the_content filter to a custom field with multiple values
- Pass all custom fields through the same filter on post load?
- How can I generate a RSS feed based on a custom WP_Query?
- Filter results with custom field values and dropdown
- Archive sorting functions by custom fields (front-end)
- Change content before writing to database
- How to remove CPT comment feed from head?
- WordPress Search Custom Meta Field Only
- How do I assign this filter to a variable? (Appending php & markup to the_content)
- Using custom fields in a filter hook
- Add Taxonomy Values Within a Custom Post Type RSS Feed
- Add an advert every nth Paragraph
- How to filter a dd/mm/yyyy date from a custom field in a query
- Change the RSS Publication Date to use a value from a custom field
- Create Posts using Import>RSS/WXR/XML and pass values to Custom Fields
- Force hide custom field metaboxes
- Saving custom profile fields
- Add source URL from Feed WordPress (Syndication) plugin to a custom field in post editor
- Update posts after populating ACF field value [closed]
- How to validate custom field on lost password form before the user id field?
- Feed, RSS not able to clear the cache and cannot change the limit of cache life time
- How can I exclude tags from category_rss function?
- filtering custom post types via meta data drop down
- global function to apply filter to custom field
- How to order posts by one custom field and filter them by another one?
- Display custom fields from custom posts in RSS feed
- Order RSS content by an advanced custom field value
- Remove a div from RSS feed
- Filter multiple custom fields Values with Check boxes
- How to get categories with posts by custom field value?
- How to Wrote Simple Calculations by Using Custom Fields in Loop?
- How can I modify RSS item titles to be either the title or a custom meta field?
- Best filter to use for modifying custom fields on a post?
- How to display childrens custom fields?
- Access ACF fields within custom preview function?
- How to add filter in custom rss feed
- Sort posts by clicks on download button
- How to fetch custom post types with its full data on wordpress?
- Let Users Filter Posts by Custom Fields
- Custom meta boxes in RSS feed
- Custom Theme Fields in Settings Menu – apply filters to one of those fields?
- Footnotes in custom fields
- How to change order of posts in admin
- How to query posts by month based on date custom field?
- Filter or order based on custom field
- How to show ACF fields in Gridbuilder custom block
- WP meta_query args not working in function
- User Filter Options on Archive Page
- How to add content with a filter when there’s no content in the editor
- change attachment custom field onChange event
- Filter and display a specific custom field value [closed]
- How to filter post using custom feild value in shortest and longest duration?
- Query Posts Via WordPress URL
- I want to add a custom field in the rss title of each post, but don’t want it to be shown on the site
- RSS Feed in Custom Field
- Create widget that filters posts on current page based on entered value
- How can I define the RSS feed content length?
- Including inline Custom Fields info with add_filter in functions.php
- Sort posts after filtering them through multiple taxonomies
- Replace category titles inside RSS feed
- Set new url from custom post field
- How to enable custom fields for pages (if not a bad practice)?
- Add a Jquery Datepicker to custom field in post edit
- Create additional short URL with custom field and 301 redirect
- get_post_meta fields don’t show up on posts page
- Include woocommerce custom field value in front-end search result
- MySQL Query that looks for post with Custom Field, then changes Category
- Create Pop-Up Box with Custom Field Content Inside the Loop
- Addition Text to Post Titles (Custom Post Types) in RSS
- jQuery – Automatic event trigger does not **really** check my form
- Display URL in a Custom Field
- pre_get_posts : only get posts by wp_usermeta value
- Display list of terms having the same custom field value
- IF Custom field value equals ZERO
- Custom Field Repeating When Using foreach
- How to add a css class to custom field value?
- Help setting up a sql query
- Advanced Custom fields not available yet during publish_page action
- Meta box values are displayed on Custom Fields list. Is it possible to hide them?
- Sort posts by custom field value
- Listing the most popular 8 city (custom fields) as used in posts
- How to delete file uploaded by Plupload
- Displaying custom field meta within WP_query loop
- WordPress won’t let me use a page slug of ‘feed’
- Meta field bulk editing no longer working in WP 6.0 [closed]
- How to fetch common posts from two feeds?
- Delete user meta but only if found in array
- WP Admin Dropdown List Filter for custom (ACF) field on custom post type(s)
- meta_query to check all custom fields
- Saved Post Meta Array Returns as String
- Thirtieth century date for a post
- Custom field in external Javascript
- list pages by custom_field?
- Get custom field from page, in a post?
- Make Custom Fields Public in JSON – API
- Conditional display based on ACF checkbox