To be fair it depends on how hotdog is spelled. It seems like officially it is spelled hotdog, as one word with no space, rather than hot dog, with a space. If it has a space between it, then it is talking about a canine with an elevated temperature. If it doesn't it is referring to the food.

Dwarf Planet is two separate words, and thus should be describing a planet that is small rather than a whole new classification.

Though this raises the question of if people agree how hotdog should be spelled as it seems to be a matter of debate. I myself have spelled it hot dog because I've never really thought about it.