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Ask The Vet
Mon Aug 4, 2014 11:28 AM CDT

Question: In your recent comments about generic dewormers, you didn't address the difference between pour-ons verses injectables? Which does a better job on parasites?

Answer: Injectable dewormers are more effective against internal parasites, while pour-ons are generally considered to be more effective against external parasites.

Injections rapidly reach consistently high blood levels when administered correctly. Pour-ons are easier to use, but absorption of the active ingredient can be affected by many factors including rain, environmental temperature, poor application technique, skin and coat thickness, and dust, fecal material or mud on the ...

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