Bekhorot 6: Milk from Meat

When the progeny of an animal doesn't quite resemble the mother animal, but has some similar traits, will it require the first-born status? Note the complicating factors of a kosher animal giving birth to a non-kosher animal, or vice versa. Also, the Gemara delves into the non-kosher animals here, because the question of their milk (say, a camel), their brine, and more might seem logical -- that the milk would be prohibited as much as the non-kosher elements of the animals. But maybe the milk is allowed. Because even milk from a kosher animal (like cow's milk from a cow) seems a radical thing to be permitted.