To be honest if the dogs are shut in crates in a garage, however nice, and with her during the day they will bark. Probably due to loneliness/confusion or maybe guarding (less likely even thought they are rotts as I suspect the place is quiet).
What happens during the day?
I don't think they should have any punishment (ie spray collars or worse) because of this. She's not sadly providing the correct environment, however good her intentions. It would be totally unfair to punish them. Also some equipment can cause dogs to turn on each other ( even though crated, they may associate shocks with each other .... ). This happened with 2 beardie brothers who ended up fighting all the time.
It's not cold - can she not bed down with the dogs in the garage? if she makes it nice and cosy it could be an ideal solution.
Failing that, is there someone who might be able to look after the dogs until she can move?
Re the landlord - with some landlords there are things you can do. For example, if she were to promise to "make good" any mess or if she paid more up front as a deposit....ie she may be able to negotiate something.
This DEFRA article is written by a very good behaviourist, it may be of help and interest:
http://www.defra.gov.uk/ENVIRONMENT/noise/research/barkingdogs/constantbarking.pdf#search=%22dogs%20cortisol%20levels%20bark%20collar%22Best wishes
Lindsay
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