Here is an aerial photo of rats actually digging their way out from under a customer’s building. In this instance they are coming up from drains below the building. Yes, the quickest, cheapest way to fix this is to add toxic bait and fill in the hole with concrete. However, as our pest technician explains, ‘it’s like fixing a flat tyre with a pump”. You need to address the root cause not just the symptoms otherwise the problem will keep coming back. In this case, we recommended a drain survey with a camera and then a repair to the drain as appropriate. Another happy customer!