I have a shoulder strap for my Alma's, but the Alma isn't practical for walking with dogs. The Speedy I don't like to wear with a strap, the Roxbury is too sensitiv, and the Saleya can't be weared with a strap.I have the PM and I love it! It is not a LIGHT bag as someone told you. The hardware is heavy!
Maybe you should go for the batignolles horizontal, that is a great shoulder bag that is light weight.... ummmm... or what about adding a strap to one of your hand held bags for doggie walks?
The BH is too big for me!
Maybe I'll buy a Danube only for my dog walking??
All the same, I'll have a look at the store tomorrow and I hope I'll make the right choice!