Of course she is still amazing, you guys had a strong emotional connection and that sort of thing stays with you. (And of course it has stayed with her too

)
First off, to answer your question: Dog walking together is not something you should fear or question, quite the opposite actually. It is a great opportunity to both keep exposing her to you, which naturally creates attraction (if the interactions are positive) and to game her, so keep doing that.
Also don't suddenly change how you act around her, it seems like she likes your company for now and if you suddenly stop being congruent she is going to know that something is up.
When I started re-gaming my ex-girlfriend. We were in a much worse place than you are in now and I was successful in not only starting to sleep with her again, but we actually got back together, so it can be done.
The first thing I did, was to realize that I wanted her, but that I couldn't chase her, I had to make her chase me. (I did some stuff that I am going to skip since you are further along in your interaction) We met for coffee and then started to hang out again (this should be what you guys are doing right now)
The first thing I did was to analyze why she broke up with me, and then show her through my actions that I had evolved and grown. Obviously we still had a strong emotional connection and by eliminating the little idiosyncrasies that she didn't originally like, I was re-amping the original attraction she had for me back when we first met. The next thing I did was to tease her a little when we were together, and lead her a lot. I was teasing in order to establish NEW attraction which would build on to the old one, and leading her based on a AFC-Adams lecture where he talks about which types of men different women was attracted to, she was an extrovert and they were supposedly responsive to leaders.
The key points I held in mind were:
Playful Kino which escalated slowly (meaning over the course of several meetings)
Strong Eye Contact
Smiling and Positivity
Fun and Attractive interactions
The last one was in one instance: We went shopping and I picked outfits for her, the I would lead her into a changing room and be in there when she changed (compliance)
Now, this was in the early stages of my game, and I did my very best not to over complicate with using too many routines, I was basically just pumping old attraction and building new on top, then testing her states, because we already had plenty of comfort and rapport.
I hope this helps, obviously it won't all apply to your situation, but it's a good start.
Good luck mate