Yeah, owning animals is seldom a sign of knowing how they actually work. With dogs it's often the same, many people rely heavily on advice from the breeder that they purchased the dog from. Often to them, the breeder enjoys some sort of godlike status when it comes to canine knowledge. I've met quite a few dog breeders, and while there are many people who are quite knowledgeable, there are also the one's that really shouldn't be let near animals. Operations that are bordering on puppy mills and so forth. Also, people often assume that medications work exactly the same way in humans and animals. People give ibuprofen to their dog because he's limping.
The worst story I've heard about was a guy who was asking for advice with his cat (around December). He had been keeping it without food for five days, and was wondering why it still hadn't gone into hibernation. You might get the cat to go to sleep that way, but I'm guessing you'd have a hard time getting him to wake up in Spring.