I would imagine in the coming years East Texas and probably the entire south eastern part of the country will have them. From my own observations the only thing keeping them from multiplying like rats are coyotes.
I agree with the coyote statement. Issue with their mass expanse is axis generally take better care of their fawns than whitetails. The does aren't scared of a fight with a predator.
Axis does are horrible mothers.
I have seen them literally leave a fawn in a field and never return to get them.
The areas where they are abundant typically have a minute coyote population. Much of the hill country doesent have much of a coyote issue and you will find a ton of them there.
South Texas is gonna have a harder time being in undated with them due to predators and habitat