[Marina B]

Droppings don't look good. Be careful giving too much peanuts as this can cause an impacted crop. Do you leave water out as well? If so, add some natural unfiltered apple cider vinegar to the drinking water twice a week. 5 ml acv to 1 litre of water. See if this makes a difference.

 

[Marina B]

The dropping looks like a starvation dropping. But she is eating, so that means food is not digesting as it supposed to be. Can you get probiotics for pigeons? Give the acv in the water and the next day mix some probiotics in with the seed. Slightly oil the seed so that the powder will stick. The acv creates a hostile environment for bad bacteria and the probiotics promote the growth of good bacteria. Rather focus on boosting her immunity.

Unless you can catch her and get her to an avian vet for a checkup, there's not really much else you can do for her. Are the droppings of the male normal?

 

[Marina B]

Hopefully it's nothing serious and she will be back to normal after she laid eggs. Skipping a day of food can also affect the droppings. Do they ever bring their babies around for eating when the youngsters have fledged?

 

[Marina B]

She might be too old to lay eggs. Some of my males keep on mating with their older females, but no eggs get produced.

 

[Marina B]

They look better than the first droppings. She might have worms. Pity you can't catch her and give her a dewormer.

 

[Marina B]

Yes, but then they need only to drink that water for the whole day. I guess yours only come around for feeding once a day, drink water and then leave.

Mediworm from Medpet has a tablet one can give, but then you need to catch them.

Also never give Panacur (Fenbendazole) as this can be toxic for pigeons.