well actually she breeds to sell, she has some show guppies that bring about 50 bucks for a trio, so with the 60-70 fry she makes out pretty good, but of course she gets fry that will be deformed or not up to par so she gives them to me and my red tail cat gets them. but to answer your question is does not matter what sex you feed but in your case i would feed males so you will have more females to breed, remember 1 male for every 3-4 females, and just because the female can hold sperm for 3 spawns does not mean it will happen, we have not had luck with that, so my advice would be to go to a lfs and get a male, males are alot easier to find and they are only a buck or so. or if you want my wife has some males she can sell you so that way you can have food for your fish and make a little profit at the same time. just go to aquabid and you will see what some go for, they have a pair going for over a hundred, thats the new see thru guppy. best of luck