What mix is a whole other ballgame. A lot of it comes down to personal preference. I think the most common mixes I see here are 80/20, 70/30, 50/50 and 100% VG. PG carries flavor far better but some people are sensitive to PG with a few actually being allergic to it. One popular vendor, Mount Baker Vapor (MBV), offers a range of mixes, even up to a kind of DIY option--you design the juice, they mix it to your specifications.
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Oh, the ratios given are PG first, VG second. 80% PG/20% VG
Good luck with this. Im hearing more and more stories about people using vaping as a weight loss tool.
Vapoor eyes er, Awesome posts. How cool is it that you are walking that senior's dog. My hat will be fully tipped to you sir once you get that poor squirrel some help.

(You know I'm joking about the squirrel, right? Well, he needs help actually. Crumb, just get him into rehab and we'll all feel better.)