Hi Frederico🙂 Do you actually mean that your daughter has been diagnosed with Cerebellar Ataxia?
If this is the case, you have been misled, the Delacato/Dorman Method is primarily thought to help with Autism, and possibly Cerebral Palsy. It is not prescribed as therapy for Cerebellar Ataxia.
The very best advice is to consult a Neurologist who has experience of ataxia patients, not all Neurologists can offer such specific advice. It is also helpful to consult a Neurophysiotherapist who can prescribe specific exercises.
DMOs (dynamic movement orthoses) offer postural support within a range of movements (flexibility) as well as encouraging muscle usage. They need to be individually fitted, according to size and function. Information can be found online by googling for example www.dmorthotics.com
I am very sorry I cannot give you the answer you are looking for. There are many types of Cerebellar Ataxia, and in a lot of cases therapy can be trial and error, so there is temptation to try any suggestion. I live in the UK, if you ever move here and register with a local doctor, your daughter could be referred to an Specialist Ataxia Centre🙂xBeryl