Hi People,   
Apologies for not getting back sooner, work took over. 
I took the pij to the vet, as you all said....they were less than helpful and could'nt/would'nt get involved. 
So I made the decision to try and help the pij as best I could and if I felt that it was suffering too much then I would have euthanaised it. 
To date, pij is still alive and no longer has the head shakes, she drinks water well but cannot feed herself, so I feed her as does my mother! 
Pij is very affectionate and snuggles up to me, it loves contact and is very friendly.....but I wish it would feed itself! 
Although it has a good weight, you can tell that it is not 100% healthy as it needs to sleep quite a bit more that my other resue pij. 
They do not mix as I worry that if the disease is Paramyxo then it will be contaminated, so I won't risk this happening. 
I hope that within time it will learn to eat on its own.   
Can anyone recommend what sort of suppliments I should give it to increase its immune system and give it a boost in energy?     
Thanks and I hopefully will get on here much more!