What is a Dog Dental Chew?
A dog dental chew is a dog treat that has some tooth-cleaning powers. Most canine dental chews are made using mildly abrasive ingredients that can help disrupt or remove plaque before it turns into tartar. Some dental chews claim to remove tartar, but once plaque has hardened into tartar, it needs to be removed by professional scaling. However, by reducing the amount of plaque in the mouth, this helps to prevent new tartar build-up.
This is usually limited to a single dental chew daily but check the packaging as it can vary between brands.
It partially depends on your expectations. If you think dental chews are going to remove existing tartar and replace the need for brushing your dog's teeth, then no, they won't do this. However, if you're hoping they'll remove some of the plaque in your dog's mouth to help prevent new tartar build-up between brushes, yes they do work.
As long as your dog isn't vomiting continuously, veterinarian treatment probably isn't necessary. However, you should avoid feeding any more of the dental treat that made your dog sick. It's likely that there's nothing inherently wrong with the dental chew, but like any dog food or treat, there'll be the occasional dog that it just doesn't agree with.