I recently went on vacation for 2 weeks and left my little girl with a friend who also has a bird; a sun canary. But when I got her back today, I noticed Suki (her name) has developed a swollen chest, as you see in the picture attachments. Usually she is a skinny, healthy budgie, so it is odd to have that swollen area.
Her behavior is also strange; she seems more lethargic/tired than usual.
She has her flight feathers, but isn't flying as usual.
She normally does not like to be held or touched for very long, but now she doesn't want to 'escape' or fly away as normal.
And she keeps her feathers fluffed as if she was sick.
Weirdly enough, she is also eating and pooping normally and cleaning herself.
I don't know what could be the matter! If you have any info, please let me know! I am very, very worried
Edit: It is most likely that she ate oyster mineral grit without any other food. If that's the case, there's nothing we can do but wait. There's 50/50 chance. Please keep her in your prayers, I would be devastated if the worst happened... I need my baby girl...