My 6 week old, Twinkle: The Little Star, was diagnosed with Hydrocephalus.

I noticed that she wasn't acting or reacting like her litter mates. Her head is misshapen, more horse like & has an open fontanel (soft spot). She would cry out. I was holding her one evening when her eyes began to flicker & twitch & then drooled very heavily. I think she had a
seizure. She may also have visual problems.
If anyone has experience with a puppy in this condition, I'd appreciate your input. Should I be concerned for her litter mates?

I have been researching online & the outcome is grim, even with brain surgery & medication, life expectancy is 2 years max. I am contemplating putting her down so she doesn't suffer.