[Dailydrool] Ideas please. Long, sorry

[sally king]

I work five days a week. I alternate taking the dogs for a playdate one day and leaving them at home the next.  
When I leave them in the house, they are silent. When I return, there is no noise until I put my key in the door, then they (Clara) barks like mad with excitement.
After I'd had Clara a couple of months a carer from the old folks' home next door told me Clara howled for 20 minutes, starting about half an hour after I left, then stopped. I also know if one of my girls is at home and still in bed when I leave, they say the same thing.
So, I did know they weren't silent, but I have left Kongs, nice beds, toys etc, so they shouldn't be bored and kick off.
However, yesterday evening I went out for 2.5 hours and when I came home, my neighbours came round and in the nicest possible way, complained they had been barking pretty much non-stop since I left. This had woken their small child and stopped the husband, who works very antisocial hours, sleeping.
Apparently they do it while I'm at work too and any other time I leave them alone. Of course, as we share a wall I must try and deal with this.
During the day, the dogs can go for more playdates. Problem solved. But I cannot always take them out with me in the evening, or take them and leave them in the car if I am going to be any amount of time.

What do people think of spray collars and ultrasonic machines?

Thanks
Sally, with Rolph and Clara, UK

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