Snappy Jack Russell

by Sinead
(Ireland)

I wonder is there any way I can help relax my JR when visitors enter my home.
She is welcoming to women, however, when a man enters the house she is growling and has snapped at them, failing to bite them yet Thank God!
She also gets quite agitated when she hears noises, e.g Neighbor passing the window, housemate walking around upstairs. She starts to growl, bark and run quickly around the house.

I would appreciate any advice..

My JR is female and apprx 2 1/2 yrs old.