Cows, camels, sheep, goats, etc being ruminants must chew their food repeatedly by regurgitating their food from their first stomach compartment and chewing their 'cud'. This then finer chewed material makes its way to the various stomach compartments to be digested.
These animals are eating plant material, the same plant material animals such as elephants, horses and hippos eat as well. However, these animals only have one stomach compartment.
- Why does one need a multi-compartment stomach and one does not if they are all eating the same/similar food?