I don't know that I would recommend planting it in a place that is easily accessible to dogs - as the bees it attracts drive my dog just bonkers and one day soon he's going to get himself stung good!
*Butterflying* has become near as popular as birding during the summer months after migration has ended. There are many butterfly id books on the market, the most popular probably being the Butterflies Through Binoculars series by Jeffrey Glassberg. Great, technical book if you like that. I notice he's recently published A Field Guide to Caterpillars which I'll have to be on the lookout for! As a beginner to butterflies, I prefer something with big, glossy photos like the Stokes Beginner's Guide to Butterflies - I don't own it yet, but do have their guide to dragonflies and it is excellent.
"Just living is not enough," said the butterfly. "One must have sunshine, freedom, and a little flower."
- Hans Christian Andersen