I live in an apartment, my whole street is flats/apartments. I think out of 3 streets there are only 2 dogs, probably due to living in a flat/shared gardens etc. Its a quiet, leafy area. Quite a few cats around.
I live on the top floor and new neighbours have moved in 2/3 months ago with a young dog, less than a year old. Looks like a cross, maybe staffy cross.
The poor thing barks all day, and into the night. I dont know if the owners work, or if they are in during the day. They also never walk the dog 
. I work nights and my DP is home at night so we started keeping an eye out and havent seen the dog out in weeks.
The last time I seen the dog outside was around 3 weeks ago, the male owner took it to the end of the street and literally stood for 5 mins then went back home
I’m not sure what, if anything, I can/should do? Other neighbours have commented they can hear the dog barking. I grew up with Border Terriers , and although they arent staffies, they were walked 3-4 times a day, went on big walks at the weekend, to the beach etc and only barked/howled for 20 seconds once a day (like clockwork!)
I feel so sorry for the poor pup. It should be out exploring and enjoying its life. We live opposite a lovely long canal , and 10 minutes away from a huge park.
Any advice would be appreciated on how to approach the situation to help the dog.