Full crop, but thin
I have 2 parakeets - one is 1-2 years old and 1 is 4 months old. I got her a couple months ago from a breeder. I was gone on vacation for about 14 days, and just got back yesterday. When I got back, I noticed that the younger one's crop was very full and she was very thin.
At first I thought it was a tumor or something, but went to the vet today and he said it was just a very full crop. He was however concerned about how thin she was. He felt her breastbone and it was I think he said "sharper and pointier" than it was supposed to be.
Ever since I got her, she's been thin, and although she seems a little more tired than usual lately, she's still seeming to do fine...is this anything I should be worried about, or just how she's built? (the other parakeet is filled out and not thin) Is there anything I should be doing? Am I worrying too much?
Additional information: They're both fed a diet of half pellets and half seeds. Droppings are a little green in both of them, but regular otherwise. She's been leaning up against my other bird when she can.