Primrose's pups at 15 days old

Primrose's pups are now 15 days old and all have their eyes open now to varying degrees. Their vision is blurry to start with and focusing of the eyes occurs around 28 days after birth. Their ears are opening and it is apparent now that they are starting to hear noises around them.
Tiddler as you will see in the video is still very much of concern and as his eyes open unfortunately they are looking as if they are set in a way that is a classic symptom of ​hydrocephalus (water on the brain). The best description, welfare impact and prognosis for this condition I have found on the Universities Federation for Animal Welfare (UFAW) website.

UFAW description of welfare impact and prognosis for Hydrocephalus on a puppy/dog is written first and foremost about the impact for the puppy/dog having this condition. Any treatment given for this condition is most often palliative and 'unless successfully treated, the problems are likely to persist and become progressively worse until the animal dies or is euthanased.' Having an enlarged head with open fontanelle, being very small and eyes that appear to gaze downward (called the “setting sun sign”) Tiddler's chances for successful treatment would be very low. I will speak with my vet on Monday about my concerns with Tiddler. This is becoming a very big conflict of head and heart for me.