I feed both the dogs 3 smaller meals a day (don't want anymore bloat). Angus usually eats all of his, but Roxey, she's kinda weird, it all depends what kind of mood she's in. But she usually eats only twice a day, even tho I still give her food. Angus is pretty good most of the time, he usually won't eat hers unless given permission!
And picking a dog, whatever one feels right, you usually know when you meet them, by looks, personality or whatever! And it's just preference on male or female. Like when we got Roxey, we felt Angus wouldn't get along with another male, so we picked a female.