I have 2 budgies whom I love very much. One is 5 years old and one is 7. Lately, the 7 year old has been looking and acting a lot differently. Her feathers are slightly dull and a bit more ruffled, so they stick up in some places. In addition to that, she seems a lot calmer than she usually is. My very playful and energetic bird now prefers to sit quietly in her cage, perched on a stick (she does play, but just not as much). She also isn’t as loud as she usually is. I’m worried that she might be sick because she sometimes shudders when I pick her up, but I also think that she could just be aging. Can anyone help?