Mourning dove without any tail feathers:(

Hello, I hope someone can help me here. One of the mourning doves who always come by our deck seems to lost all of his tail feathers. I am not sure whether it is male or female (I don't want to call them an "it" so I'll use "they") but I am including a picture that I took:



I gave them some bread and they ate it nicely but they walk as if there is something wrong with their feet. I wanted to take the little one in to see what happened but they flew to another balcony nearby. I am not sure if this would help but I also took a picture of the dropping:



If this bird is a female, could they be egg bound? There is also another mourning dove with this one who is trying to jump at them.

The loss of the tail feathers in itself may not be a problem, it happens quite often when birds are in the middle of a hard molt, or occasionally due to a predator attack.
The droppings don't look good, though. That rice-water coloured liquid is characteristic of hexamitiasis, a protozoan infection similar to canker, but that usually needs a longer period of treatment to disappear. The treatment is the same as for canker (Flagyl or equivalent) but for at least 10 days.
The bird is puffed up and hunched, which does indicate abdominal pain, so I can see why you thought of egg binding. Is she still coming round?