> I tried to put him on his side, he flew a strop
first off, were you trying to 'alpha roll' him? if so DO NOT DO THIS. consider this, if you were in a new, strange place with new strange people and one tried to stop you eating (he thinks its his) then tried to pin you down how would you feel?
you need to work on getting him to trust you. leave him be to eat for a bit, if you want something from him trade it for a titbit, eventually ask for his attention when eating and offer him a tasty titbit (i suggest tossing it gently to him to start to avoid him feeling defensive), then slowly start to add it to the bowl. it will take a long time but will be worth it.
do you know anything about his past?