Popdragons are only mentioned once in How to Speak Dragonese.
There is no description whatsoever of a Popdragon. It might be inferred that they are relatively small and perhaps bite-size.
Popdragons may be a distinct species of dragon, or perhaps it simply refers to dragons prepared in a certain way, like pop corn. However, if the latter is the case, it is extremely difficult to roast whole dragons as their skins are, at a minimum, fairly fire resistant.
Popdragons appearsas part of a meal served to the Fat Consul.
|“||He was eating a light snack of double reptoburger with tomato-and-dormouse relish and popdragons on the side.||”|
|— How to Speak Dragonese|