> This has been happening for the last couple of weeks.
So is this is a completely new behaviour then, has it ever happened before? I have a terrier type mongrel and an HPR but both have an established night time routine that seems pretty undisturbed most of the time. My mongrel will bark at night after he's had a holiday at Grandma's - but that's because she lets him sleep in her room! He usually needs a few days to settle back in here. Have you or she been away from home recently?
Other common reasons for night time disturbance are external noises (car doors, foxes, footsteps on gravel etc) and internal noises (alarm clocks, boiler cutting in, radiators ticking etc). Does your girl wake you at a regular time each night? If so, it's likely to be noise. Double check what time your boiler comes on or set your alarm to a similar time to see of you can hear something new. If you ignore her completely, what happens?
If it's
noise then try to minimise the sound, or her ability to hear it (shut windows, give her a covered den to sleep in). If it's
toilet then try and make sure she goes properly before bed or just check she doesn't have a problem that requires her to go more often. The weather lately may have an impact, some dogs don't enjoy peeing in the rain so don't go properly and the wind and rain have been particularly noisy overnight. If none of that works, and her barking continues to be a problem you could try using a baby gate so she can see you are still there.
Finally what is the magnetic collar for - is there an underlying problem that may be causing her night time waking? If it's pain related she may just be waking up a bit stiff and cold. Could be worth reviewing her pain medication and the type of bed she uses. HTH :)