Cavalier Huntsmaster and horse master feat what happens?

[arcanine]

Hey yall, I'm trying to figure out if I can still get a bird and a dog from the class and not just one.
The horse master feat allows my mount to level with me. But dose it now allow my dog(s) and/or bird(s)? If I took the feat would it only work for one companion then must use the rest of the levels for the other? One would always be -1 level .

[toastedamphibian]

You don't have a "mount", the archetype replaces that class feature with animal companions. The feat does nothing for them.