Thin Sun Conure
I have two sun conures. One whose about 2 and a half years old, and the other whose about a year and a half.
The older one is a typical healthy, happy sun conure with some unusual coloration to her primary and secondary flight feathers, as well as the tail feathers. The ones that are suppose to be solid blue are tipped butter yellow, and the ones that are suppose to be solid green are tipped regular conure yellow. I think she might be a hybrid, or just have a genetic color mutation, but I don't know.
The youngest one though is very thin with a protruding breast bone. I feed them both a very healthy and varied diet, and even give him more, but he's still very thin. I've even spoiled him with nuts and other high calorie food, but nothing.
I've also noticed that his grip isn't very strong, even after having him for about a year now. I give him plenty of calcium and protein, but nothings helped. He also has to poop every ten minutes, but there's nothing unusual about the droppings.
At first I thought is was the diet, so I tried different things, but didn't get any results. I also thought it might be worms, but I haven't seen anything in his droppings, and if it was, then my other conure would have them too. Maybe he has a high metabolism?...
Also, he's a very quiet bird. It's not that he can't be loud for any reason, he just doesn't like to be. He's more content being a sweet shoulder bird the majority of the time.
He seems healthy otherwise, but his weight really worries me. What should I do?