Nicole I'd like to welcome you to helpful gardener.
Browning and brittle needles on juniper, it usually notice for a post mortem.
Juniper is quite cold hearty, but I suspect you will need a cold house in N. Dakota. To protect from snow pack more than cold. (FWIW I needed one in NH).
Juniper indoors is hit with a double whammy of central heating and uber low humidity. Either if which is more than enough to kill Juniper.