Housing and feeding rescued finches, finch?

That's really cool that you rescued them. Yes put a wire screen around the larger cage to just be safe and finches can eat a pellet type of food but the pellets are super small....I do not remember the brand name but the pellet colors are red, green and yellow and it can be mixed with seeds. Plus you will want to feed them apples and broccoli they love it. the pellets can be found at pet co or pet smart.