Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to know if your dog needs a diet change [title] Notice if your dog appears lethargic or tired. [step] Maybe you notice your dog appears more tired or worn out than usual. They may not be as excited about going for walks or seem less enthusiastic about playing with you than they usually are.

Ending1: [substeps] If your dog isn't moving around much, it is likely the diet is settling their weight-loss stat. Your dog may lose interest when you play with them. Ending2: This may be a sign that they aren't eating the recommended amount of calories to keep up their energy levels. [substeps] If you notice your dog exercising more or suddenly seems hungrier, they may be in poor health or are having trouble eating. Ending3: These are all signs of a poor diet and can bring even more stress on your pup. [substeps] You may notice that your dog is on a long loop diet and won't keep up with you at home. Ending4: You may also notice your dog spends a lot of time sleeping or lying down. These may all be behavioral signs that your dog may be due for a change in diet.

Answer format: ending1/ending2/ending3/ending4