I managed to get all the moths, here's some tips for you guys. Focus on the PLANTS, feed the moths and sell their dust to earn money and buy some plant boxes (the moths don't die, must be a bug, so you should use it to your advantage). Upgrade that elevator thing near the telephone, makes it easier to bring things on the second floor (it needs 2 wood planks). Once you get the sable egg buy the water in the shop to make the pumpkin (sable food) grow faster, the sable caterpillar tends to disappear when you don't feed it at certain amount of days. I hope this helps you all!!