therefore the variety of good nutritional food items is a key!
in terms of pac food, i do think it needs to be in combination with other food items, not to be the main food item.
problem with pac food that there is not enough data to make any conclusions really, especially long term. It looks like it makes frogs grow fast, but genetics is a factor here too, so what is having more influence, pac food or may be genetics or may be both, environment factors such as husbandry will play certain role here.