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Be sure to check out the suggestion about crate/ separation alternatives. It is, personally, something I do often as we have 4 dogs in the house. I don’t always have a way to separate dogs in the household where I can work with one individually, and so I use my car basically as a crate. That way I can work with one dog at a time, without other distractions.
Just remember to make sure the car is a fun place for your other dogs to be!