My B has been back on the DAP collar for the last 10 days (I meant to put it on earlier than 10 days ago but I thought I was just imagining this change of behaviour and wanted to wait a little more time) and I must say I have noticed a difference again (takes about a week). She is much calmer if I leave her with a friend of mine (she looked after her for one day and said she was crying all the time), she is also calmer when I go into town and there is a lot of noise around and she sleeps in her basket at night in the room next door to my bedroom (got her when she was 2 years old and she is very anxious as she had been abandonned twice for ripping everything off when she was left on her own)). In other words, it is working for her, may not "work" for other dogs but my vet told me to put in on regularly and then take it off every 2 days. I probably didn't do what I should have done when she moved in but, this is helping her (and me of course as I am also less anxious!). It is worth a try! I usually take her with me wherever I go (even to work at times) or leave her in a crate in my car where she just falls asleep (when I left her outside her crate in my car, she ripped a seatbelt, peed on my seat and chewed a bag). So, I feel I have no choice, I live alone, work long hours and noone wants her (I must admit, last year I tried to place her but the moment you talk about a dog that ripped a door , chewed leather shoes, jackets, seatbelt, escaped from the car through a gap left to leave air in (had to take my car to a garage to replace rubbers around the side pannel as she forced her way out- don't know how she managed-), half strangled herself trying to lift roof out of a crate inside my flat…well, I gave up, I like her, she likes me, but DAP collar is on when she goes "over the top". I have always had dogs living with me (and my family when I lived my parents a long time ago) , pyrenean shepperd dog, italian greyhoung, alsacian dog, basset mix, Scottish shepperd dog (rescued dog when I lived in Scotland, died of cancer), sometimes two at a time and I must say I have never had to deal with such anxious behaviour and...destructive behaviour! She has found a good home but...what constraints at times!!