Punctuation is the name for marks used in writing. They are to help understanding and correct reading. These are some common punctuation marks used in English: . is a period or full stop.
In the past, less affluent Okinawans ate sweet potatoes. Lots and lots of sweet potatoes. Rice, especially white rice, was more expensive and was a bit of a status symbol: it was something consumed only by the wealthier folks.
Rabbits and guinea pigs are obligate herbivores. Although chinchillas do occasionally eat insects in the wild, their main diet is herbivorous. Small herbivore nutrition should, one supposes, take as its starting point the grasses and wild plants that these animals would eat in the wild.