At almost three inches snout to vent, 1 canadian nightcrawler is a good sized meal. Mojo will eat three regular nightcrawlers at max in a sitting but usually just eats two (had three last night). Then he wont come up for food for about two or three days. When Mojo hit his last growth spurt he was about your frogs size. All of a sudden he wanted to eat everyday for about two weeks straight. Is your frog atleast eating a couple times a week?