diff --git a/inquisitor/app.py b/inquisitor/app.py
index 424bfea..d6fd637 100644
--- a/inquisitor/app.py
+++ b/inquisitor/app.py
@@ -7,7 +7,14 @@ import traceback
 from flask import Flask, render_template, request, jsonify, abort, redirect, url_for
 
 # Application imports
-from inquisitor.configs import logger, DUNGEON_PATH, CACHE_PATH, subfeeds, init_default_logging
+from inquisitor.configs import (
+	DUNGEON_PATH,
+	SOURCES_PATH,
+	CACHE_PATH,
+	subfeeds,
+	get_subfeed_overrides,
+	logger,
+	init_default_logging)
 from inquisitor import sources, loader, timestamp
 
 # Globals
@@ -35,9 +42,22 @@ def feed():
 
 @app.route("/feed/<string:feed_name>/")
 def subfeed(feed_name):
-	if feed_name not in subfeeds:
+	# Check for and apply subfeed overrides
+	subfeed_overrides = get_subfeed_overrides()
+	subfeed_config = subfeed_overrides or subfeeds or {}
+
+	# The built-in inquisitor subfeed contains sources not in another subfeed
+	if feed_name == 'inquisitor':
+		all_sources = os.listdir(DUNGEON_PATH)
+		for subfeed, sources in subfeed_config.items():
+			for source_name in sources:
+				if source_name in all_sources:
+					all_sources.remove(source_name)
+		return feed_for_sources(all_sources)
+
+	if feed_name not in subfeed_config:
 		return abort(404)
-	return feed_for_sources(subfeeds[feed_name])
+	return feed_for_sources(subfeed_config[feed_name])
 
 def feed_for_sources(source_names):
 	# Determine exclusion filters
diff --git a/inquisitor/configs/__init__.py b/inquisitor/configs/__init__.py
index eabdaa5..ee31800 100644
--- a/inquisitor/configs/__init__.py
+++ b/inquisitor/configs/__init__.py
@@ -1,4 +1,10 @@
 from .resolver import data_path as DUNGEON_PATH
 from .resolver import source_path as SOURCES_PATH
 from .resolver import cache_path as CACHE_PATH
-from .resolver import logger, add_logging_handler, init_default_logging, subfeeds
\ No newline at end of file
+from .resolver import (
+	logger,
+	subfeeds)
+from .resolver import (
+	add_logging_handler,
+	init_default_logging,
+	get_subfeed_overrides)
\ No newline at end of file
diff --git a/inquisitor/configs/resolver.py b/inquisitor/configs/resolver.py
index 64d4fa4..9758df9 100644
--- a/inquisitor/configs/resolver.py
+++ b/inquisitor/configs/resolver.py
@@ -31,6 +31,7 @@ DEFAULT_VERBOSITY = 'false'
 # sources within a subfeed separated by spaces
 CONFIG_SUBFEEDS = 'Subfeeds'
 DEFAULT_SUBFEEDS = None
+SUBFEED_CONFIG_FILE = 'subfeeds.conf'
 
 
 def read_config_file(config_path):
@@ -67,6 +68,18 @@ def read_config_file(config_path):
 	return accumulated_configs
 
 
+def parse_subfeed_value(value):
+	sf_defs = [sf.strip() for sf in value.split('\n') if sf.strip()]
+	subfeeds = {}
+	for sf_def in sf_defs:
+		if ':' not in sf_def:
+			raise ValueError(f'Invalid subfeed definition: {sf_def}')
+		sf_name, sf_sources = sf_def.split(':', maxsplit=1)
+		sf_sources = sf_sources.split()
+		subfeeds[sf_name.strip()] = [source.strip() for source in sf_sources]
+	return subfeeds
+
+
 # Read envvar for config file location, with fallback to default
 config_path = os.path.abspath(
 	os.environ.get(CONFIG_ENVVAR) or
@@ -105,14 +118,25 @@ is_verbose = (is_verbose == 'true')
 
 subfeeds = configs.get(CONFIG_SUBFEEDS) or DEFAULT_SUBFEEDS
 if subfeeds:
-	sf_defs = [sf.strip() for sf in subfeeds.split('\n') if sf.strip()]
-	subfeeds = {}
-	for sf_def in sf_defs:
-		if ':' not in sf_def:
-			raise ValueError(f'Invalid subfeed definition: {sf_def}')
-		sf_name, sf_sources = sf_def.split(':', maxsplit=1)
-		sf_sources = sf_sources.split()
-		subfeeds[sf_name.strip()] = [source.strip() for source in sf_sources]
+	subfeeds = parse_subfeed_value(subfeeds)
+
+
+def get_subfeed_overrides():
+	"""
+	Check for and parse the secondary subfeed configuration file
+	"""
+	path = os.path.join(source_path, SUBFEED_CONFIG_FILE)
+	if not os.path.isfile(path):
+		return None
+	overrides = read_config_file(path)
+	if CONFIG_SUBFEEDS not in overrides:
+		return None
+	value = overrides[CONFIG_SUBFEEDS]
+	if not value:
+		return None
+	parsed_value = parse_subfeed_value(value)
+	return parsed_value
+
 
 # Set up logging
 logger = logging.getLogger("inquisitor")