giardia symptoms in cockatiels
One such parasite is Giardia, which is a singled-celled microbes (protozoa) found in the intestines. Giardiasis generally affects cockatiels, budgerigars, lovebirds, and other birds of the parrot family, like macaws, parrots, and cockatoos. Symptoms of the Giardiasis infection include: 1  Malnutrition. 2  Diarrhea. 3  Faulty absorption of nutrients.  Weight 1  loss. Itching.  Feather 1  plucking. Excessive pecking of the 2  skin. Increased vocalization in the infected  bird.