Problems
Signs of illness to be aware of are if a bird seems withdrawn, feathers are ruffled and the plumage is dull, sits with its eyes closed, watery or dull eyes, runny nose, sleeps a lot, looses interest in its environment and stays at its feed cup.
The droppings may change color and be loose (if healthy they are grayish white and not to thin). Also a lot of tail bobbing, dropping off it's perch, odd breathing, sneezing, and excessive scratching.
Some of the common illnesses your lovebirds could contract are injuries from fighting, Psittacine Beak and Feather Disease, Polyoma Virus Infection, yeast infections (Candidiasis), Avian Pox Virus Infection, bacterial infections, internal parasites, mites, ticks, egg binding, intestinal influenza, coccidiosis, respiratory ailments, and diarrhea.
An ailing parrot should be taken to a avian veterinarian for diagnosis and treatment.