A delivery driver issued a stark message to customers who fail to restrain their dogs when they’re expecting a parcel.

The worker shared how his opinion on dogs has completely changed after realising how dangerous they can be, especially when untrained or left to their own devices.

He said on Reddit: “I used to love dogs. Always wanted one myself. But this job made me realise how dangerous these beasts actually are. I haven’t been bitten yet, but I foresee an accident coming. Almost every…