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Pet Rats/breathing issues


Hi there. Spoke to you other day regarding my rat  who i think had pneumonia. Well he went to the vets on tuesday and got a steroid injection and finally the vets gave an amoxicillin injection that should last 3-5days. Ive continued to give him baytril too along with what he got. He also got a little oxygen while he was getting injected as he was stressing. Anyway he was great after that so lively, ate loads and it was as though he could breathe out his nose again. Today he seems tired and starting to breathe from his tummy again but hes not gasping. Is another vet trip due for him? Another steroid boost and amoxicillin. Only thing is my vets are closed until tuesday so would have to try and take him to another vet practice for this one treatment.

A shot of amoxicillin that only lasts 3-5 days isn't long enough!  You must get him back on amoxicillin. He must be on it orally twice a day for at least 3-4 weeks now since he's had a relapse.

Here's some info to share with your vets:

Concerning amoxicillin and veterininarians:  Many vets don’t want to use amoxicillin on rats.  This is probably because in vet school they learn that amoxicillin can’t be used in guinea pigs, rabbits or hamsters (because it kills the good bacteria in their intestines), and they probably generalize this to rats and mice.  However, rats and mice usually tolerate amoxicillin quite well.  In my experience only a very small percentage of them will get diarrhea from it, and this is not life-threatening; it will usually clear up with a probiotic, or the amoxicillin can be stopped.

Here are some references for using amoxicillin in rats for your vet to check if they are reluctant to prescribe amoxicillin:

Exotic Animal Formulary, Third Edition, James W. Carpenter, MS, DVM editor, Elsevier Saunders Publishing
Page 377, Antimicrobial and antifungal agents used in rodents.
Ampicillin for mice and rats: dosage 20-50 mg/kg PO, SC, IM q12h
(Note: ampicillin and amoxicillin have essentially the same adverse reactions and effectiveness, so they can be used interchangeably)

Blackwell’s Five-Minute Veterinary Consult: Small Mammal, Second Edition, Barbara L. Oglesbee. 2011 John Wiley & Sons, Inc.
Page 588, For Bacterial Infection
For rats (do not use in hamsters), amoxicillin/clavulanic acid (12.5–15 mg/kg PO q12h) may also be used.

ViN (Veterinary Information Network, Inc.) Website

Thomas Donnelly, BVSc on 02/05/2006  “Amoxicillin is safe to give rats.”

Johanna Briscoe, VMD, on 07/08/2004  “I have used Clavamox liquid in a rat and it worked beautifully on an abscess that I thought may have been from a bite….  Clavamox dose same as in other mammals—13.75 mg/kg PO BID.”
(Note: Clavamox is the brand name for a mixture of amoxicillin and clavulanic acid.)

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Debbie Ducommun


I can answer any questions about pet rats, but you will probably be able find answers to simple questions more quickly on my website at If you have a life-threatening emergency you can try calling me at 530-899-0605. I am not usually on the computer on the weekend.


I have been "The Rat Lady" since 1985 and am recognized as one of the world's experts on pet rats. I have 3 published books and already answer lots of questions about rats daily.

President of Rat Assistance & Teaching Society

I am a monthly columnist for Pet Business magazine, and my writing has appeared in other magazines. I have 3 published books.

BA in Animal Behavior

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