I really feel for you, my Tessa had the same operation, and she made a full recovery, apart from a bit of stiffness in her hind legs you would never have known what she had been through. That is a good sign that Hendrix has feeling in his legs already. Tessa was older, she was nine, and she went on to live for nearly four more years.
Luckily she came to work with me, and I supported her with a sling while until she got the full use of her legs back. The cage rest is a difficult time, but is only for a few weeks and to see her getting stronger everyday and eventually walk again was the best gift I could ever have had.
Thank goodness Hendrix was diagnosed early, and he does have a very good chance of making a full recovery too. My thoughts are with you both at this difficult time!
Debbie x