Hockey-masked murder freak Jason Voorhees isn't known for his gentle side, but on at least two separate occasions a dog has crossed Voorhees' path and lived to bark about it. In 1981's "Friday the 13th Part 2," camp counselor Terry has a dog named Muffin. Muffin is seen running into Voorhees out in the woods. Later, the counselors find the corpse of an animal and assume it must be Muffin. But it must have been some other animal, which we'll assume died of natural causes after a long and fulfilling life, because at the movie's end, we see Muffin reunited with her camp counselor friends.
Another dog, this one named Toby, plays a somewhat prominent role in "Friday the 13th Part VIII: Jason Takes Manhattan." Toby escapes several close encounters with death, including a sinking boat and some trigger-happy crooks. After several hours on the mean streets of New York City, Toby turns up for the denouement.
Does Voorhees have a soft spot for dogs? An oft-repeated story suggests that Kane Hodder, then stunt-man/actor who portrayed the horror icon for most of the series, refused to do a scene where Voorhees kicks a dog.