Yes, wolves are known to kill puppies and Arctic foxes. There are a few reasons why wolves might do this. One reason is that wolves are territorial animals, and they may view puppies and Arctic foxes as a threat to their territory. Another reason is that wolves are predators, and they may simply be hunting these animals for food. Additionally, wolves may kill puppies and Arctic foxes as a way to control their population size. This can help to prevent overpopulation and competition for resources within the wolf pack.
It is important to note that not all wolves will kill puppies and Arctic foxes. Some wolves may be more tolerant of these animals than others. However, it is still important to be aware of the potential for conflict between wolves and these other animals.