1000m2 is a quarter of an acre so would be ok for a couple of orphan lambs for the freezer if keeping for only 4-5 months with extra feed and hay but would be totally unsuitable otherwise.....unless.....you kept a couple of Ouessants which are very small and a plot that size would be ok for 2 if split into 2 paddocks, had a stable or shelter for confining them in if necessary and you were not intending to breed and increase numbers.
Hope that helps?