My dog barks but sinec its 2 months old barks just alittle and not much, my question is when its fully grown 5lbs approx and gets older will it always bark or when do they usually bark? my lab/pit mix barks only when you play with her or someone rings the bell, if she is left alone she doesnt bark, u think if i leave my yorkie alone once its older it will bark any idea? reason asking , apartment i live in doesnt allow dogs

so figured little dog if she barks wont be to loud but when it did bark think it was loud enough for someone to hear, are those bark collars any good? i would think there not for the health of the dog