Poor old boy
My Josh was deaf and almost blind when he was a bit older than Blake and I'm sure he would have found it incredibly difficult and distressing to have to adapt to a new home and new people. Josh was still going out for short walks and was quite lively and was pain free, but he couldn't cope with furniture being moved in the house and sometimes got lost down the bottom of the garden and needed to be rescued.
I hope Blake finds the perfect retirement home soon with someone who understands his needs and has lots of time to cuddle him on their sofa.