Generally digital and other cheap NV need an infra red light to help them see things, which is dainty visible. Should help you see more things less intrusively than with a torch. Proper NV will cost a lot more, but will turn night into day (literally). For animals there is also the option of a thermal camera.. picks up warm things, costs more than decent NV, but performance keeps improving and prices falling. No way (warm) wee beasties can hide from you!