Poor Elvis. I'm sure he'll deal with it OK as he'll have time to adjust to the changes.

A lady down the street walks two labradors every day, and one is totally blind from cataracts. They walk the same route every day and she's perfectly content when she's out and at home. Beautiful dog - last week I scratched her ears and she rolled on her back, put her head between my feet and insisted on belly scritchies

Good luck with Six's tests too