As I mentioned earlier in the thread, we took Z to PAWS a while ago and they could get three cut and gave her back to us

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I never got the details of why professionals could not get the job done as I was away, maybe my wife did. Basically they could not hold her down.
In the meantime on days my wife volunteers has been taking Z to the SPCA to be with other dogs. Occasionally their vet will cut her nails, so we know it is possible. We think it is because Z is familiar with the vet...
Even if I never can cut her nails, I need to get her calmer so others can.