Until relatively recently
there was no well established word for a baby hedgehog. Although the word kit
had occasionally been used, and sometimes pup or piglet, most books about mammals
just called them `baby' or `young' hedgehogs.
However, by the early 1990s the word hoglet (or sometimes hedgehoglet) had
been introduced, and this word seems to have been in general use among those
with an interest in hedgehogs since at least the mid-1990s.