Principle: People should not feed wild animals because it makes them dependent on humans and less likely to survive on their own.
Given that...
People should not feed wild animals because it makes them dependent on humans and less likely to survive on their own.
How can this be justified...
Bird lovers commonly feed wild birds to attract them to their yards and gardens.
Evaluate / Goal
We're looking for a reason to treat the bird lovers' feeding of wild birds as an exception. Is there a reason why these wild birds won't become dependent on humans and less likely to survive on their own? Maybe the bird lovers are only feeding birds that are already dependent on humans. This kind of answer could justify the bird lovers' actions even if we accept the principle.