We ended up seeing a specialist 2 weeks ago who diagnosed him with idiopathic polyneuropathy, a peripheral nerve disorder of unknown cause (however has been linked to the consumption of raw chicken necks). The treatment for that is just high quality care until the temporary paralysis is over which we were doing (taking him to the toilet every 2 hours, hand feeding/drinking etc..) and after 3 days post diagnosis he regained use of his legs for a short amount of time and since then the time in which he can stand increases everyday, though he is still recovering..
Unfortunately, there appears to be another problem (just as we were gaining confidence that he was well on the mend!).. over the weekend he after dinner/after being excited that we came home he started to gag whilst producing a very unusual sound (like a roar/honk) as if he was gasping for air and this morning he had the same thing happen but also vomitted a foamy pale liquid.. it is really terrifying to watch as his eyes were full of panic and he became anxious, the episode lasted about 2-3 minutes of which he then acted like nothing had happened. So we took him to the vet yesterday who admitted that his case was getting to be beyond their league but that he could now have laryngeal paralysis (where the doors that open in the larynx to give access to oxygen is paralysed, decreasing blood oxygen levels) which can occur secondary to nerve disorders/be related to a lazy thyroid amongst other things.
So we have now booked an another appointment with a neurologist tomorrow to get a proper diagnosis and hopefully some answers as to what we can do to help our little man!
Just thought i'd give people an update incase they were interested/or if someone ever experiences something similar.