I got 7 guinea keets and 2 polish chicks almost a week ago. 3 of the keets are a little over a week old, and the other 4 are 1 week today. The chicks are somewhere inbetween. But one of the larger keets waddles instead of walks. S/he doesn't walk like the others. And s/he also crouches down a lot. S/he sometimes crawls too. Does anyone have any idea what might be wrong? This is my first time raising birds, and I just want them all happy and healthy.