Our 3 year old, boy Budgie, Sky, has been scratching his vent area with his foot a lot. Almost looks like he is kicking backwards. He also tries to groom that area with his beak. He is not fluffed up at all, and he has no droppings stuck to his vent area. He eats, flies, chirps and seems happy. But I am worried because this doesn't seem like normal behaviour.