Original: The kangaroo mouse collects food and maintains large caches in their burrows, which are excavated to a length of between 3 and 8 feet (1 to 2.5 meters).
Simplified: The kangaroo mouse collects food and maintains large stocks in their burrows. These burrows are excavated to a length of between 3 and 8 feet (1 to 2.5 meters).