Watchdog is an auto-detection engine from Datadog that surfaces performance problems in applications without manual setup or configuration. Using machine learning algorithms, it detects issues such as latency spikes, elevated error rates, and network issues across various resources in the environment. Watchdog creates a feed of "stories" with notable findings, each highlighting the timeframe of interest on a timeseries graph and providing a plain-language summary of what happened. The engine automatically surfaces related behavior that might have the same underlying cause, allowing users to identify likely culprits. Additionally, it detects network issues in cloud infrastructure, enabling failover and re-routing of traffic to unaffected zones or another cloud provider. Watchdog builds on Datadog's established machine learning features and continually adds algorithms to detect new kinds of situations anywhere in the environment.