The veterinary dental specialist I use said she had seen some pretty bad anaerobic infections come in as a result of sealant sealing something bad in. She does not recommend their use. She does recommend brushing, squirting water between the teeth either with a syringe meant for this sort of thing, or a human, battery operated device like a water pick (which, if you go that route, try to use it outside unless you are way more coordinated than I am.