My grandfather was in the military he was deployed for years he came back but it's like he's not here. I can't play with him bc lots of things set off his ptsd. It's like he's a emotionless zombie ready to kill at any time. My dad is also in the military he is soon to get deployed I'm sacared I don't want him to be the same way. How can I help my grandfather & what do I do about my dad?? I can't loose them both....