Good news! I have tried a lot of the massage techniques and they are working! I do them if we are sitting on the floor watching tv and he falls asleep so it must feel good. Now when he gets up and starts to yelp, I just have him lean on me and start to massage his neck and spine and around his incision, and the yelping stops immediately. Then when I stop massaging, he's wagging his tail and ready to go. I am so relieved I found something that works, and hopefully soon he won't be having the pains anymore. Thanks so much for all of the advice, we go back to the vet tomorrow for staple removal and then hopefully we get the go ahead for normal activity, and then crossing my fingers the pains will stop altogether! Thanks again everyone, such a relief for me to watch him healing after what felt like weeks of pain. 

Thank you everyone for caring about my pup, it means the world when I log in and see all of the kind words and thoughts about Apollo feeling better! He went from yelling every time he got up yesterday, to only doing it 3 times today... 3 TIMES!!! He has been doing it between 5-10 times every day! I am so thankful he is starting his uphill jump from his surgery, I cried I was so happy! Hopefully it keeps getting better, I am just amazed it was almost an overnight transformation. Thank you to everyone for the massage advice, I think that really helped a lot, and he loves it! We will be going to the vet tomorrow morning for staple removal as long as all looks well, and hopefully just keep getting better! Thanks again everyone!