You can add in a hornworm on whatever day you would like. If you want to do it on a feeding day that is fine.Feeding- I'll feed him Sunday-Wednesday-Friday 3 large crickets. Is it ok to give him a horned worm on Tuesdays? Seeing him beg for food is gonna break my heart. When he comes to the front of the cage, looks straight at me with both eyes, I'm gonna cry but I'm gonna stay strong.
It is hard with these guys but obesity has serious health complications for them. Renal failure and gout being two of the more serious ones. So we have to practice tough love to ensure what is best for them.
Did you get all the correct info for housing him and the correct lighting?