Currently there is no way to see a visual distinction,
for example, between a newt and a gecko. I know that
you can only hover your mouse on the monster and it
will tell you what it is but this can be very tendious
at time. Same thing for your pet, it's hard to know
which one it is when there is like 3 dogs on the
screen...
Some suggestions to add a feature like this pretty
fast. You can either do the age old "palette shifting"
trick to have "different" pictures for the monsters.
You can also maybe add a little picture at the top of
the monster with a number of "+" equal to the monster
level (a bit spoily... but I guess that everyone
knows, for eaxmple, that a large dog will be powerful
than a little dog!). The "+" strategy might not work
for dragons, because I guess they have all the same
level...
For your pet, just add a little "heart" icon by it or
somwthing like that!