Person who cant make kibble: Are you sure there’s water in your pot? I make that mistake all the time. Are you on mobile? Mobile uses a different kibble system. If neither is the problem try using a different creature’s egg.
Instead of trying to remember all the different egg sizes and what they make or combing through your fridges while looking at the app, just read the egg description. It says provides simple nutrition, regular nutrition, exceptional nutrition etc. Which corrosponds with regular kibble, exceptional kibble and so forth.