<human>: Can you give me the gist of the text in a nutshell?

We do not have a fully fenced yards, so we walk or two beagles a lot (3 times a day, long walks).  The one in question is recently adopted as of March, 4 years old, female.  Don't really know her background.

She's fine in the house, rarely barks.  It's when we take her outside.  She'll let out a bunch of barks right out the door, then will usually calm down, until she smells the first scent, she can (and does) bark for almost an entire block.

We've noticed it's more common in evening walks because there are a lot of dogs in our neighborhood, so lots of scents.  We're really considering obedience training, but wondering if there's anything we can try first? This is probably stupid, but we're tried giving our other dog a tiny treat if she'd get on a barking spree and then tell her no treat.

Someone at work suggested a bark collar, but I don't want her to be afraid of walks, or to lose her spunk - I just don't want her barking the entire time she's smelling around and enjoying her walk.
<bot>: Female, 4-year old, rescue beagle barks consistently on walks, at least 75% of the walk.  Otherwise she's fine in the house, won't bark at things outside, etc.