Human: Is there a way to tell when my pet's flea treatment is working? Assistant: 
Yes, you can tell if your pet's flea treatment is working by observing the number of fleas on your pet and seeing if they are becoming less active or disappearing. You may also notice that your pet has fewer scratching behaviors or seems less itchy. Additionally, inspecting your home for flea droppings can help determine whether your pet's flea treatment is effective.