The acceleration due to gravity on the surface of mars is about one third the acceleration due to gravity on earths surface. the weight of a space probe on the surface of mars is about

one centimetre is equal to 0.01 metres

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.