If you got them from a hatchery, the best I can say is prepare for the worst. They might not actually be purebred Malays, might not grow as big or act the same or even look the same.
But beyond that, true Malays are a very different breed from normal chickens. You'll need wider perches for them, set quite low, and not too high of protein in their diet. If by chance you do get more than one male, watch them as they mature. They will very likely fight once sexually mature, and might fight to the death. Otherwise they're SUPER pets, and super foragers as well as amazing moms. Their size tops most any other breed, and their height makes it especially easy to hand-feed them when walking around. They're not very cold-hardy though, but will handle snow and frost if they have a good coop.
Now, again, if you got hatchery stock there's no saying what they'll be. They might just be a longer legged version of a normal production layer, who knows. Ideal Hatchery used to sell true Malgache Games, didn't like their fighting tendencies nor broodiness nor poor laying, so they crossed in Turkens and Australorps, and ended up with today's product of some weird looking naked-neck, nothing like the original gamefowl.