Snail without shell is slug rub earth graze and over grazing animal in little garden agriculture pest must to control crops food harmful livestock health worm farmland toxic slow crawl on grass moving

snail without shell slug rub animal garden agriculture pest control crops food livestock farmland worm nature danger natural disaster harmful helpful extermination poison vomit health toxic slow crawl across brown clam crawling crawls grass green land movement moving single slime slippery slowly small species sticky summer wildlife pet spray