Crikey, you guys get worried about things like the length of your babies excretions!!!
I have never worried about the length or otherwise of fish's poo, I only really worry about the colour. If it is pale or white then that could be a sign of problem.
I am not sure about whether you are overfeeding your fry, they certainly have full little bellies, but I am not sure that is a bad thing. When feeding fry, the main thing to remember is to give them a proper balanced diet, even if you feed your adults flake only then take a bit more time with your youngsters.
The best food is live food such as newly hatched brine shrimp and whiteworms, but if you cannot manage that then frozen brine shrimp is also good. If you cannot manage that then try feeding liquidised, blanched vegetables. Flake is fine aswell, but as part of a balanced diet. I know of breeders who feed flake first half an hour before feeding live foods as it apparently makes the live food stay in the gut longer.
ZM foods also do a good granular food which you can buy in different sizes.
I am not trying to contradict you 5tready, small feeds three to five times a day is great advice, but sometimes it is not possible. I work quite long hours so I cannot feed my fish five times a day. A good way around this is to feed live foods such as whiteworm and brine shrimp which survive in the water for four or five hours and give a supply of food for a longer period of time.
The best I manage is some decapsulated brine shrimp before I go to work, some granular when I get back from work and some frozen before I go to bed. In the summer I give lots of live foods as this coincides with the fish breeding.