Hmmm, if your pacman is an adult. If its a male only 1 **** roach every two days, if its a female only 2 cockroaches every two days. Because females are larger, of course they will need more food(or so I assume). Only dust the roaches ONCE a week. You can also try feeding her earthworms, for a variety. So once a week you can feed her 2-3 large earth worms. If your frog is burried, dont try to pick her/him up. Leave her untill she surfaces. She will surface, when she does, then you plop in her/his food. Make sure not to leave the insects in more than 15 minutes in the enclosure. To prevent injuries, even if the insect is supposed to be harmless. Also, before feeding try misting her, then plop em in. She will be more on a feeding frenzy after this. I think 3-4 roaches would be a bit too much on one sitting. She could probably eat it, but it would go down better if you only do 1-2 LARGE roaches every two days. 3-4 or more could be asking for obesity. Obviously these frogs are naturally fat, but the fatty deposit could well sorround her eye impairing her vision. I have seen cases of "over-weight" pacmans, that their eyes have so much fat around it(I saw this in a petstore once a few years ago), that the frog cant see very well or at all. Its also not too good for them for that matter.