Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to watch for signs of illness in senior dogs [title] Monitor your dog's food and water consumption. [step] As your dog ages, you should monitor how much food and water they consume. Watch to see if they eat and drink more or less than they used to.

Ending1: Usually, senior dogs will eat more and sometimes drink more water, so you may notice your senior dog is not eating and drinking more or less than they used to. [substeps] Look on dog food labels or adult dog food labels. Ending2: Notice if they move more when they exercise. If they crawl or vocalize more than they used to, they may be a senior dog. Ending3: You should also notice the food they are eating. Some dogs may start eating only soft food instead of hard food. Ending4: If they do not drink enough water, check for signs of inflammation. [substeps] Monitor how often your dog urinates, needs something to eat, or drinks regularly.

Answer format: ending1/ending2/ending3/ending4