Why does my budgie have white beak buildup, voice change, and gulping?

Some infections such as fungal infections can cause flaky growths around the beak or nose. Growths on the skin from infection, tumors, parasites, etc may also cause a dirty growth appearance anywhere on the body. Regurgitation of food may also cause stuck debris, as well as problems with the crop causing food or bacterial to come back up into the mouth. If it's impeding Chico, can't be cleaned away (or returns even with cleaning) or you are seeing other signs of illness such as changes in energy levels, behavioral habits, eating and drinking habits, etc, then having a vet look at it in person is best. They may need to flush the area and clean it and start Chico on a round of medication to treat as needed.

Poor Violet! Some crusting around the nose and a sudden cere color change can indicate the possibility of an infection going on, especially if there is discolored discharge or crusting stuck to the nose. Cleaning the nose and removing any debris may make things more comfortable for Violet, however if it returns or she begins to show signs of illness, having a vet take a look is best. They may need to flush the nostrils of any debris, or start Violet on an antibiotic or fungal medication to resolve the issue.

Your parakeet could be suffering from a mite infection caused by the bird mite cnemidocoptes, The infection would show up the beak as well as the legs. You should have your bird seen by a veterinarian who can easily diagnose a mite infection and then treat it with ivermectin, You should bring both birds, as both need to be treated.

Angel is beautiful, thankfully his cere looks a nice healthy colour. It is not uncommon for the beak to flake a little depending what part of the keratin cycle he is in . As for the crusts, these are most commonly due to a little mite that borrows under the skin. Known as scaly beak, it is caused by knemedicoptes mites. To treat it you need an ivermectin based drop, many vets stock a product called xeno which you apply to the skin. I would weigh him to ensure appropriate dosing. If you are concerned he seems dull or symptoms are worsening you should take him to an avian vet.

If you're seeing white lesions in his mouth or on the inside of his beak it could indicate an issue such as a bacterial or yeast infection that has taken hold. If you're seeing streaking on the outside of the beak, it could indicate a cracked beak from an injury or even poor nutrition/underlying illnesses. If it's impeding his ability to eat or the lesions are on the inside of his beak/mouth it is best to seek veterinary care to try and find the underlying cause and get treatment. Making sure Kiko is on a diet that is formulated for parrots can also ensure he's getting the right nutrients. You can offer fruits and vegetables as extras, but a balanced diet is needed for optimal health.

In the second image, she definitely looks unthrifty and ill. Without a physical exam though, it is difficult to say for sure what is going on with her. If you can, transition from an all seed diet to a pelleted diet which is more balanced. Brands include Harrison's, Lafeber, Pretty Bird or KayTee Exact. You can still offer a small amount of a fortified seed mix as well as fresh fruits and vegetables to round out the diet.

If you're seeing discoloration or growth on the beak itself or Rj is acting ill (not wanting to eat or drink, trouble breathing or eating, listless behavior, etc) in addition to the change, it would be smart to have a vet take a look to rule out any issues such as a bacterial or fungal infection causing it. Some foods and pellets can also cause staining of the beak or feathers, so checking to see if any fruits or vegetables given match the discoloration may alert you to what is causing it so you can remove it and offer other items in addition to her regular diet.