not yet. i wasnt sure about what to feed them, but i knew what two were eating at the store so i kept them on what they were use to. i got this one, Aset, and the last one from a different store and the clerk at least gave the impression she didnt know anything about their eating habits, accept they ate on thursdays. i went with the 10% body weight. i'll try larger if that is wrong. i was worried about going too big right off and harming them. they were all under 200g before their last feed.