When it comes to toothpaste for dogs, it is important to use a toothpaste that is specifically formulated for dogs and not use human toothpaste, which can contain ingredients that are toxic to dogs, such as xylitol. Here are some safe and effective toothpaste options for dogs:

1. Virbac enzymatic dog toothpaste: This toothpaste is enzymatic and comes in five different flavors. It is effective and safe for brushing dogs teeth.
2. Petsmile Professional Pet Toothpaste: This toothpaste is approved by the Veterinary Oral Health Council and contains Calprox, which is proven to safely prevent plaque, fight bacteria, and improve bad breath. It is meant to be used two to three times per week and requires no toothbrush. The toothpaste is free of fluoride, parabens, sulfates, and other ingredients that could be harmful to dogs.
3. Nutri-Vet Enzymatic Toothpaste for Dogs: This toothpaste is effective and safe for dogs. It comes in a variety of flavors and is enzymatic, which helps dissolve plaque and prevent tartar buildup.
4. Vetoquinal enzymatic toothpaste: This toothpaste is enzymatic and great for dogs. It is safe and effective for cleaning dogs teeth.
5. Organic dog dental kit: This kit includes organic toothpaste for dogs that is effective, easy to use, and smells great. It comes with a toothbrush that is easy to hold, and customers say their dogs tolerated the brushing much better than on other occasions.
6. Natural dog toothpaste: There are also natural toothpaste options for dogs that are free of harmful chemicals and use natural ingredients. Some examples include Kissable All-Natural Toothpaste, TropiClean Fresh Breath Clean Teeth Gel, and Ark Naturals Brushless Toothpaste.

It is important to note that toothpaste should be used properly by following the instructions on the packaging. Additionally, developing a toothbrushing routine with your dog will help to reduce plaque and tartar buildup, freshen their breath, and prevent periodontal disease.