But if the water becomes deeper still

Positioned in the water in an uncomfortable pose,
afflicted with a relatively high mean density,
suffering from substantially high frictional drag,
and unable to raise and lower its neck
and hence unable to adopt a synchronous gait,
we conclude that giraffes would be very poor swimmers,
and that it might be assumed that they would avoid
this activity if at all possible.

Testing the flotation dynamics and swimming abilities of giraffes by way of computational analysis in the Tetrapod Zoology section of scienceblogs.com. Submitted by Gabriel Smy.