Using a leash or harness on a bunny
is a highly debated subject amongst
long-time bunny owners and experts
for good reason. There have been
many accidental deaths as a result.
You see, because rabbits are prey
animals, they feel very confined and
trapped when on a leash. If they
become scared—which is very easy
with all the new sounds and sights
outside—they can easily break their
necks, their backs or be frightened
to death.
You never know when a dog might
walk around the corner, scaring your
rabbit and causing her to bolt.
Leashes that go around the neck
are particularly dangerous as they
can suffocate your bunny if she
pulls too hard :-(
You'll also want to consider the other
dangers of taking your bunny for a walk
... bunnies can contract diseases from
other animals, and you never know
what they're going to sniff or get into
when they're outside. You also have to
be careful of pesticides, which can kill
your bunny :-(
If you DO decide to use a leash or a
harness, you should remember that walking
a bunny is nothing like walking a dog.
Bunnies generally don't like to be
followed, so being behind her when you
walk might make her nervous. If she gets
too scared, be sure to take her inside
right away.
http://www.rabbitsecrets.com/AltA.htm