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Can enrofloxacin harm my 7-week-old puppy's growth or joints?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Large (61lb +) | Male | unneutered | 1 month and 8 days old | 5 lbs

Hi dear Petco Pet Education Center, I have enrofloxacin to my two 7 weeks old dogs prescrived for my veterinary because of an enjured in the next. They prescribed it for 10 days but i stoped yesterday. I gave my dogs enrofloxacin for 3 days and about 80 mg in total. Could enrofloxacin cause a damage to my dogs? Can i do something to avoid the damage enrofloxacin causes to puppies? Thanks and regads

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Answered By Destini R. Holloway, DVM

Veterinarian

Published on December 3rd, 2018

Baytril (Enrofloxacin) does have the potential to stunt growth or cause joint abnormalities with the cartilage if given in pets younger than 8 months of age. I would not expect these changes to occur with such a short dosage; however, I would recommend expressing your concerns to your veterinarian and getting them on an alternative medication. The whole class of Fluoroquinolone drugs are not recommended for pets under 8 months of age unless they are absolutely necessary. Best of luck with your pet Presto and take care!

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