It all depends on their personality. Personally, i don't think that Hermione's personality would be shown through a cocker spaniel. What about the cocker spaniel is simlar to Hermione's personality? Yes, Severus' animal form could be a lion, but i don't think that is the form it would take. You need to dig deep into Severus' personality, and you'll get his animagus.
New question. What steps do you think would be involved in becoming a Animagi?





. My point was that elves and centaurs for example are 'Beings' only by wizards intellectually designating them as such, and weren't always considered officially so in wizard history. Nature, however, does not choose to stop considering any living thing an 'animal' just because that living thing upgrades its label to 'Being' in its own mind. If magic is part of nature (as it must be because of all those fantastic magical beasts) and somehow influences what animal form an Animagus takes, well... how do Magic know?

).