They may have gotten complaints about the barking and put a bark collar on him.
Unfortunately, your options are very limited. If you can show that he has no shelter or fresh water on the balcony, you can contact the animal control and report it. Neglect is very hard for them to prove as long as those two things (shade and fresh water) are provided and there is no obvious health issue.
Unfortunately, your options are very limited. If you can show that he has no shelter or fresh water on the balcony, you can contact the animal control and report it. Neglect is very hard for them to prove as long as those two things (shade and fresh water) are provided and there is no obvious health issue.