Is TropiClean Fresh Breath for cats with carbomer safe to swallow daily?

Thanks for visiting Petco Pet Education Center, formerly Petcoach. I can understand some of your concern here regarding carbomer. There have been some studies evaluating its toxic effects, mainly when used as a gel substrate in eye medications in animals and this is what I was able to find regarding this:

Use: Carbomer-based gels significantly extend contact of solutes or suspended solids with the corneal surface

Overdosage: Doses up to 1 g/kg PO in dogs x 6 mo resulted in no observable clinical effects and no pathological lesion
No toxic effects expected; should signs develop, treatment should be symptomatic
Systemic toxicosis not expected due to poor bioavailability

So therefore, there are no concerns here when this compound is ingested in animals (dogs or cats). This is typically the case when dealing with over the counter supplements or dental products in general. If toxicity concerns were there, a product would likely require a prescirption and would not be available as an over the counter.

Thanks for visiting Petco Pet Education Center, formerly Petcoach and best wishes with your pet Cooper moving forward and her dental care. Take care. : )