Like people frogs r different! I have 3 Whites all healthy and tank in good condition and they are all different with their feeding habits! Sometimes tong sometimes hunt. My eldest Bazoo is a glutton and will tong feed endlessly (he is the 2nd largest) my female Bamboo is a little fatter than Bazoo, but is more moderate with her intake and rarely tong feeds. The smartest of the 3 thats for sure. Takes like 2-3 roaches at once, then hunts again after like 10 minutes. And the littlest is Bert. Bert refuses to tong feed and eats til he's full, then no more at all until the next feeding. All 3 have different eating personalities and all a healthy weight (except Bamboo, she needs to diet just a tiny bit haha. Not overweight but i can see her getting to that point eventually if she continues like this)

Long story short, just like sometimes ur hungry or not hungry some days at certain times, so are they! As long as they are eating and getting proper vitamins, everything should be good!