MASON CITY, IA (KWWL)  Some are calling the incident animal cruelty, but Duke is still a very lucky dog.

"Very lucky to be rescued and brought to our facility," said Sybil Soukup.

Soukup is the Executive Director of the Humane Society of North Iowa in Mason City. Last week, Duke was brought in with his six siblings. A passerby had come across the 8-week-old puppies stuffed inside a plastic storage tote, sitting on the curb of a Mason City intersection.

"Unfortunately, it was a very cold day," said Pat Gansen of Mason City Animal Control. "It was one of those days it didn't get above zero. Luckily they had each other to keep them warm."

Read more from our NBC affiliate KWWL.