<?php $image = get_feature_image($post->ID, 'blog', true); ?>
<div class="item mb-4 mb-lg-0">
    <a href="<?php the_permalink($post); ?>"><img src="<?php echo $image ?>" alt="<?php echo $post->post_title; ?>" class="w-100 mb-3"></a>
    <div class="h4 title mb-3"><?php echo $post->post_title; ?></div>
    <p><?php echo get_custom_field('caption', $post->ID, short_content($post->post_content, 80)); ?></p>
</div>