He is depressed, and milk is okay in very small amounts. Rats can eat a lot of what humans can eat, but there are some toxic foods... I won't get into that though. If you get two young boy kits then they will likely play with each other and leave him alone for the most part.
And he will have the joy of not being alone. And when he passes away, the kits will have each other. No they will not kill him, that is silly.
I have been breeding and raising rats for upwards of six years, and males seem to get more depressed than females when their cage-mates pass away or find new homes. At least in my experience anyway. Lol.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.