I've been giving them these dental treats for years. They love them and they seem to help. Doubled sided knobs to help with tartar and works the gums. They even seem to help with their breath.

Pros: Dogs love them

Cons: none

We have been using Iams Tarter Treats for several months. They seem to be a harder texture than regular name brand dog biscuits. They just don't "gobble" them down. It takes them a while to finish them, so that is why they work better.
Nice breath is also a plus.

Pros: My dogs loving these treats = Shiny teeth & fresher breath

Cons: None for us.

I no longer give to my dogs. They are pricey and my larger dog chews it twice and then swallows it. Seems a waste of money and could be something they could choke on.

Pros: Not sure about the dental benefits

Cons: Large dog goes right through them

Dogs like these and they seem to taste great. I am not sure how great the ingredients are for teeth, and i would not just use these and nothing else for cleaning teeth

Pros: dogs like them

Cons: im not sure about the ingredients

my weiners want to chew but they seem to not like the texture

Pros: clean teeth

Cons: hurts gums on my dogs