Advice on Jackal's tummy.

One of my turkey hens got out of her pen somehow and someone ran over her on the road. :( She was our friendliest hen and came to greet us every single morning. I can't believe she's dead! This is one of the reasons I really dislike living near a city by a busy road. I want to move back out into the middle of nowhere so that if an animal escapes it just wanders around the barnyard until you put it back up again. Sigh.

Sorry for ranting. I shouldn't write when I'm upset, but I did want to ask your advice on something. Jackal has been vomiting yellow bile off and on during the night for the last couple of weeks. He used to do this as a puppy and it's because he's going too long between meals. I'm feeding my dogs a raw diet and normally I just feed them once in the morning. So I'm thinking of splitting their breakfast into two meals and I also need to find a snack for late at night. So can anyone recommend a healthy, but fairly inexpensive snack for at night before bed? It can't be too calorie dense because he gains weight like there's no tomorrow (darn Beagle genes lol). It doesn't have to be raw, in fast I would prefer it's not just for ease of handling right before bed. I've tried canned pumpkin and it's a fight to get him to eat it. It doesn't like it at all. I would use a spoonful of peanut butter, but it gives him awful gas. I also tried cooking white rice, but it doesn't seem to be enough to help. Thank you for your suggestions.