
I have a similar neighbour at the bottom of my garden, it is one reason that I ahve the Graden fenced off so that the dogs don't go in that part of the garden.
As you say occasionally one of the dogs will ehar a strange noise at night and let out a bark or two. He stopped me the other day and said Oh those are the ones who bark as soon as it is light. Bit of a cheek as next doors Terriers howl first thing, and the dogs don't utter a peep until they hear someone flush the loo in the morning.
Years ago he said the same, but at that time I woke the dogs up to take them for a walk with my friends dogs at 5 and 6am (they hadn't a chance to bark), and they weren't back in the house until 7.30 to 8am, and would only bark at the postman when he came.
I got worried and asked the two men that adjoin my hose how often the dogs barked and they dais no more than they would expect if there was a visitor, and not at all while I was out, much to my releif.
I rang our Environmental Health for advice and they said he woudl have to keep a diary of times and durations of barking for at least 3 weeks if he complained. I wrote hiom a note to this effect with the address of who to contact. Never heard anything.
Now at the start of the year my old giorls had been waking and obviously winging too quietly to wake me and I found that she had messed in ehr kennel, so I brought her inbto the kitchen, and she does wake me whining about 5am. My Jozi also gies stacato hurry up barks once she hears someone up in the morning.
Interestingly enough none of them bark once put to bed if my teenager daughter rolls in late after a night out, or when her boyfreind leaves for work in the morning, only if they hear me get up.