You can already get pygmy hippos
small enough to keep in a pond. Well, the babies are at least. You might have to keep slaughtering them before they get big, then buying new ones.

Baby pygmy hippo meat should be quite tender though.
( Mystery_Bob, Wed 24 Jun 2009, 22:25, archived)

that'd be terrible to explain to the kids
mummy, why does the pygmy hippo look different today?
( spacefish bong!, Wed 24 Jun 2009, 22:37, archived)

Just tell them that they shed their shells like crabs.

( Dr. Shambolic je suis charlie, Wed 24 Jun 2009, 22:56, archived)

for some reason i am now imagining them to be like giant beetles
having wings under their great backs. if i wasn't going to bed, i'd photoshop it
( spacefish bong!, Wed 24 Jun 2009, 23:02, archived)

they'd be a job to flush down the loo

( Moon Girl Technologies horrendous beanbag, Wed 24 Jun 2009, 22:39, archived)