The common toads here - BUFO BUFO, you should always use the latin names if entering in natural history sections, were set up. I caught them at a local pond, put them in a set piece to photograph them, then returned them to where I obtained them. I can see nothing wrong in this as long as the animals are not distressed, and the end product looks correct. It certainly means that lighting and so on can be arranged before hand, and the end product should be as you require. The camera was on a tripod and a weak flash fill used to simulate full sun on a cloudy bright day.