Add plain canned pumpkin (not pumpkin pie filling) to meals
Mix in cooked sweet potato
Offer cooked green beans
Add cooked carrots
Include small amounts of oats
Mix in plain cooked brown rice
Add a little psyllium husk if recommended by a veterinarian
Feed small amounts of apples without seeds or core
Add peas in moderation
Use dog food formulated with higher fiber
Increase fiber gradually
Provide plenty of fresh water
Consult a veterinarian before changing the diet for dogs with health conditions