Liz Wray said she “felt revolting” when she saw the rodents come out of the packet she was hoping to purchase.
She said: "They were repulsive and made me feel revolting.
"I was with a work colleague who reached out towards the crisps and started screaming. They dropped down from the shelf.
"I'm not sure if they were inside the multipack or if they were just in among the packets. But there were a lot of holes in the bag - they'd obviously been at them."
She added: "When I told the store manager, he said: 'We can't do much about it because we are near a canal and railway track and the mice tend to come through the floor'."
