I talked to one cuemaker the other day, they said kangaroo is soft, but has texture on it. And Italian calf is also soft, maybe not quite as soft, is smooth and slick and has no texture.
all the Kangaroo i have had was smooth with no texture at all.it is also very strong,stronger than cow.
i haven't seen baby goat but i have seen baby lamb on a jacket and it is just as soft as kangaroo if not softer and i would imagine that the goat and lamb are the same.
i think anything baby will be texture free.