They are hard to get to accept prepared foods. My 4th generation captive bred fish still mostly ignore flakes/pellets. All will take live worms (California Black Worms) at first and most can be coaxed to take frozen worms pretty easily.
Males are the caretakers of the next generation and can be left with the eggs/fry thoughout their growing stages. I've never had a male hunt fry, no matter how many he is caring for. This also applied to fry of other fish in the tank. All of the males I've kept would defend microrasbora fry from their parents!
Unless you have a large tank (40+ gallons), I would not recommend more than one male if you are going to mix genders. Multiple females are best with one male, so that the male's aggression during spawning is spread out. They are related to betta, so its best to remove the females after spawning. If the male cannot drive the female(s) away, he can and will kill her. Lots of plants and hiding places (rocks/driftwood) is essential if you plan to breed.
FYI: they breed like rabbits. My first male had 3 breedings in one year (1 female, then 4, then 4). Without any special work to save the fry, I raised over 120 to adulthood. You may see the change in the number of females: Unfortunately, in a 29gallon heavily planted tank, he killed her overnight after they had spawned. The later breedings with mulitple females, they were all left together in the same tank. There was a lot of chasing at first, but no real harm came to any of the females. I removed them after the fry were about 3 wks old (so to prevent another breeding before I was prepared to handle the fry).