beefy the dog bit him because of severe pain, trauma and is very common, it doesnt know what its doing at that moment in time

No way does it mean he is going or is going to bite in future,god he is 4 months old just a baby..

Who knows for sure what will happen in the future. but he will make a full recovery with the right treatment, and live a healthy life.

A perfectly healthy dog could get arthritis etc doesnt make a difference really as there is nothing or sure