Complex sentence: For that reason, true Spanish type is rare amongst feral herds, but where such animals have been found, the Bureau of Land Management (BLM) and other agencies attempt to blood-type and preserve them.
Split into simpler sentences: For that reason, the true Spanish type is rare amongst feral herds. But where such animals have been found, the Bureau of Land Management (BLM) and other agencies attempt to blood-type and preserve them.