There is no one-size-fits-all answer to this question, as the best water bubble dispenser for small dogs will vary depending on their size, weight, and preferences. However, some recommended options include the Meadows Brand Pet Water Bubble Dispenser, which is designed specifically for small dogs and cats and features a 2.8L capacity. Additionally, the bonus Pet Food Mat 24”x15 ½” is a great addition if you have pets that like to eat off of surfaces (such as tiles or countertops).