Rat droppings are sausage shaped and approx. 1 -2 cm long. Mouse droppings are thinner, spindle shaped and approx. 5mm long.
You will notice smears or grease marks from the rodents body as they repeatedly brush against objects or walls.
And of course you’ll see damage to stock or the fabric of your premises as well as nesting material such as shredded insulation, cardboard, paper, plastics etc.
Rodents are known to spread infections such as Salmonella, Hantavirus and Weil’s disease. Contamination of foodstuffs and work surfaces can be transmitted through wet fur soaked in urine.