So this time Romano bravely died at the hands of terrorists after refusing to help them. You get a screen detailing his death and at the end:

Romano never returned home
Pecorina and Sniffy never leanred of his fate
As Sniffy grew, he concluded that Romano had abandoned them
Sniffy held resentment and hatred towards his father until the day he died

What? So it's a war. Mice (including civilians) get mutilated and killed every day. *Clearly* the most probable explanation is that Romano abandoned them. Come on, Sniffy, don't be stupid.