Hi, beautiful budgie!!
Budgie are the one species that seem to be able to handle PBFD. But they present differently, instead of loosing feathers on head , the loose all their tail feathers, and sometimes wing feathers. Of course everybody can be different. But I'm inclined to guess this Is not PBFD.
My guess is a scuffle....or something else entirely.
Concerns are always best addressed by avian veterinarian. We are just regular folks sharing our experiences. Burds are complex .
A good tool to help monitor health is regular weight checks, weekly in healthy birds, daily when issues or sick and during treatment . Because most burds loose weight when sick as they burn way more calories. Because budgies are flighty that's a little harder. What I did was remove perches and toys, took the cage into the bathroom, or bedroom. Get a Tupperware, or box, or container that's just large enough to hold them. Put it on the scale and zero it out. Turn off the lights and reach in and grab them. Put them in the container and weigh them. Return to cage and put everything back in. I had to treat duck birds for nearly a year and that worked well with less stress.
In fact just this evening my avian vet who is also a longtime freind, was talking about a sick budgie. She stressed the importance to them about monitoring weight during treatment. She shared with them how we had done that with mine, and how helpful it was.
I don't know what you feed yours? Molt is a little stressful on birds they need more calories and a small bump in protein. You can offer egg food , make sure is in date and nit spoiled, as it spoils easy. Or offer a little boiled egg, mine live boiled egg, and you can remove un eaten ( I give them around 20 min) then I remove. Hopefully you offer leafy greens and veggies as part of their diet. That provides missing nutrients that all seed diet lack.
This article talks about budgie sometimes never show symptoms, and has one picture of another grass parakeet showing the more typical appearance that budgies would have. It does have some graphic images if you are sensitive. I couldn't find the better article I read before, but this will fo
The avian vets at the Avian and Exotic Animal Clinic have written this blog about Psittacine Beak and Feather Disease. Thank you so much to them. Read this blog to learn more about PBFD, what causes it and how to treat it.
www.northernparrots.com