Let one of my racers out today in the garden and he can't seem to fly, normally he fly straight to the roof and follows me round the garden flying from fence to fence ( he won't leave the garden) . When thrown up into the air he seems to have no strength in his wings, yet he is chasing his mate about , also seems to be holding his wings low , eating drinking well and droppings fine gets git and minerals and there don't seem to be any other problems . Any ideas