Hi mama! Yes, totally normal, a 1-month-old can definitely finish 8oz (around 240ml), especially if they're hungry or going through a growth spurt, kaya don't worry. A few of us sa circle namin noticed our babies' feeding amounts were all over the place around that age, sometimes 4oz, sometimes 8oz or more, and the pediatrician said as long as baby's gaining weight and healthy, we're good!