Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to exercise a mother dog [title] Take the dog on walks. [step] You should take your dog on daily walks. If you walked your dog regularly before pregnancy, you may continue with this schedule.

Ending1: If your dog periods more often, you should increase your walks to twice a day. [substeps] In the first few weeks, you can exercise your dog at least once a day (45 minute walks). Ending2: If not, start taking the dog on fifteen minute walks once or twice a day. After the first month of pregnancy, you may need to shorten the length of these walks to prevent overexerting your dog. Ending3: You should begin with a walking regimen of two regular walks every two weeks, every two to three days. Increase the frequency each day until your dog gets the most exercise. Ending4: The mother's womb reserves fertile water and provides the pregnant dog with this fertile water. You can take the mother dog on walks from 1:00-12:00 every week.

Answer format: ending1/ending2/ending3/ending4