Any dogs that can trace the elephant and pester him with their barring would do.
Von Bloom even thought of taming some hyenas, and training _them_ to the hunt.

This idea was by no means quixotic.

The hyena is often used for such a purpose, and performs even better than many kinds of dogs.
One day Von Bloom was pondering over this subject.

He was seated on a little platform that had been constructed very high up--near the top of the nwana-tree--from which a view could be had of the whole country around.

It was a favourite resort of the field-cornet--his smoking-room, in fact--where he went every evening to enjoy a quiet pull out of his great meerschaum.