That's good news, I told you they loved those things. Just remember not give them to him to often, they are very high in fat. My guys also really love silkworms, they are also more of a treat but they have more protein then hornworms and less fat. His staple if he eats them should be the nightcrawlers and if you can get some roaches instead of crickets they are also good for the staple diet. Hornworms, silkworms, phoenix worms, butterworms, waxworms should only be treats but can all be thrown into the diet. Variety is the key to nice and healthy frog. Hope he keeps eating for you. And I think you mentioned he was 6 to 8 months old ( could have been a different thread ) but if this correct he would be considered a juvenile so you can offer him food every 2 to 3 days, at this stage they don't need to be fed every day and if offered every day they more then likely wont eat if they are still full and digesting there last meal.