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Updated on September 23rd, 2025
Pet's info: Dog | Coonhound - blue tick | Male | neutered | 4 years and 7 months old | 85 lbs
We have adopted a street dog on the island of Utila, Honduras where we live. There is no vet but we sent blood samples to the mainland and were told our lovely 80-90 lb. hound dog has ehrlichiosis. We are ablate buy doxycycline I'm not confident about the dosage information we are getting since we can't actually speak with the vet ourselves. Is 100mg twice daily for 3 weeks an appropriate course of treatment? Or at least an appropriate amount to give a dog of that size to start?
3 Answers

Answered By Daniel Fonza, DVM
Veterinarian
Published on August 17th, 2017
Answered By David Elbeze, DVM, MRCVS
Veterinarian
Hello, Blue would need double the amount you mentioned - either 400 mg once a day or 200 mg twice a day. 3 weeks is the minimum time, in some cases treatment need to be continued for longer, it really depends what are the symptoms, how long they have lasted and how fast they disappear once treatment has been started. in severe cases prednisolone needs to be added to the course of treatment as well.
1Pet Parents found this answer helpful
Answered By Dr. Massimo Orioles, DVM, Cert AVP, MRCVS
Veterinarian
I can confirm that dosage would be 5mg/pound of body weight. So in total 400-450 mgs once daily. Yes treatment is needed for at least 3 weeks of time, depending on the persistency of the infection.
Remember to give the medication with food and a bit of water as it could damage the mucosa of the first part of the gastrointestinal tract if not swallowed correctly.
Please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further.
0Pet Parents found this answer helpful