How scarey that must have been And I for one wouldn't judge you. You did what you had to do to make him break his grip.

Only advice I could possibly give you is to make sure they are seperate when they eat. One inside and one outside so there is no way that they could possibly get to one another.
I can't see you having to rehome him or put him down if they are kept completly seperate when food is around.

Good luck.