Hey that's good to hear!! Try feeding every second night and see how that goes, and if he doesn't take it then don't stress and try the next. What you did is an actual way a lot of people will get there frogs to eat when they are hesitant, but its more rubbing under the chin/lip then bumping. That or touch his foot with it, it doesn't always work and I know it sounds weird but they don't like it much and don't worry he wont bite his own foot. If you notice while feeding that he tries to push it away or bats it with his foot while in front of him, this means he isn't interested and isn't hungry. And again glad he finally ate own his own, sometimes it takes awhile but they usually come around.