gistfile1.php

echo '<span>Familles<br>';
$terms_id = _get_term_hierarchy( 'animal' );
$post_terms = get_the_terms( $post->ID, 'animal' );
$terms_id = array_intersect_key( $terms_id, $post_terms );
foreach ( $terms_id as $parent => $enfants ) {
	$term_links = rtrim( $term_links, ', ' );
	if ( ! empty( $term_links) ){
		$term_links .= '<br />';
	}
	$term = get_term( $parent, 'animal' );
	$link = get_term_link( $term, 'animal' );
	if ( is_wp_error( $link ) )
		continue;
	$term_links .= '<a href="' . esc_url( $link ) . '" rel="tag">' . $term->name . '</a> : ';
	foreach ($enfants as $i => $id) {
		$term = get_term( $id, 'animal' );
		$link = get_term_link( $term, 'animal' );
		if ( is_wp_error( $link ) )
			continue;
		$term_links .= '<a href="' . esc_url( $link ) . '" rel="tag">' . $term->name . '</a>, ';
	}
}
echo rtrim( $term_links, ', ' );
echo '</span><br>';