Yes, increase the food amount. They need lots of nutrition while they are growing. They will usually stop eating when they have had their full. Another way is to offer as much food as they want for 15 minutes. When your pac reaches adulthood, you'll reduce the amount. But for younger frogs it is essential that they get lots of nutrition. Offer food every night and make sure you use vitamin supplements and calcium dust so your frog will develope properly.