Massage should help the area. It takes a long time for blood to reach the Achilles tendon so that's one of the reasons why the healing process is so long. Plus I don't even think your Achilles will ever be the same after this. 
Good shoes are essential also.
You have your guard up when it comes to dogs, but after this bad experience I don't blame you. I am lucky, never had anything negative happen to me from a dog. And I grew up with a doberman and then later on a lab retriever and my mother inlaw had a rottweiller. But all dogs I have ever known have been treatly very kindly and been loved alot. They were all gentle and my doberman and lab would sleep on the end of my sons bed when he was 6 months old.
I had a personal masseur for a year. She used to come to my home every week, i was great, she was so professional, and really helped iron out a few kinks, we are still good friends. Growing up my friends had staffordshire bull terriers and he wAS a big dogman, we used to go to shows, he used to breed them, was very passionate, My family always had dogs, and another of my close friends had two dobermans, and I never had a issue with dogs before. But after the attack, it is like an involuntary reaction, there is just a stronger reaction to certain stimuli, I can become intensely aggressive in heartbeat, I jokingly tell people that pitbulls transferred their spirit into me. What worries me is that I like to be really aggressive, I dont like the negative attention it sometimes gets me, but I have just become an middle aged angry dude.
PS I have good podiatrist and custom orthotics
