Eating in Harvest Moon A Wonderful World

I think my character is healthy and strong, but sometimes he will get dizzy if he works too hard and his stomach will make a sound "Grouuu ..."

My friend told me to buy energizer from Van or drink at Griffin's Bar but it doesn't really work. I prefer Tiny Yamame or Huchep. NEVER DRINK MILK! And in my strategy, I give milk to Romana after I'm rich and have more than three cows. Then she will give me

1. A Cat
2. A Watering Can
3. A Piano Score