Complex sentence: In the countryside, it is customary to feed livestock (though not dogs, cats, and other pets) with the wafer, as the animals of the household are to be treated as people that day and are traditionally believed to speak with a human voice.
Split into simpler sentences: In the countryside, it is customary to feed livestock (though not dogs, cats, and other pets) with the wafer. As the animals of the household are to be treated as people that day and traditionally believed to speak with a human voice.