Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to reduce flatulence in dogs [title] Avoid feeding your dog foods that are difficult to digest. [step] These gas-causing foods include peas and broccoli, which have high amounts of indigestible sugars. Foods with indigestible fibers, such as beans, should also be avoided.

Ending1: Avoid making changes to your dog's diet without first discussing it with your vet. [substeps] Many high-fiber foods contain stored gas, which can slow the metabolism of your dog. Ending2: These foods contain higher levels of fiber, so there is less of them stored in the digestive wall. [substeps] A high fiber diet contains a number of hormones that prevent the effects of flatulence. Ending3: Dog foods high in fiber are often a sign of hyperhnia, which is a type of dry mouth. Foods which are overly processed, such as dried fruits and raw meat, should also be avoided while pregnant or nursing. Ending4: Avoid milk products, like cheese and fluid milk, as well. [title] Switch to feeding your dog premium dog food.

Answer format: ending1/ending2/ending3/ending4