I fed the fish for two days in a row, mainly to assure myself that the catfish still exist (and they do) but the behavior of the Koi turned out to be interesting. They are usually very skittish - probably because we have had extensive Koi eradication campaigns - but now seem to watch me when I move around the pond. Yesterday they all stayed on the surface for as long as Ron and I were out there. I fed them before he left so they should be really friendly today.