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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.

Experience in the area

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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    K = Knowledgeability    C = Clarity of Response    P = Politeness
Debbie07/30/15101010Thanks for the fast and quick response .....
Anne07/25/15101010Awesome knowledge and quick response time too! .....
Anne07/25/15101010Debbie was quick to respond and also .....
Connor07/16/15101010Thank you for all the help!:)

Recent Answers from Debbie Ducommun

2015-08-17 bump between eye and ear:

Hi Donna,  It could be an abscess. See the article on that topic on my website at However, what appears to be an abscess on the face all too often turns out the be cancer. Only time

2015-07-30 Rat Tumor or Cyst?:

Hi Deb,  It is probably a benign mammary tumor. I'm in the process of posting an article on my website about a high-fat calorie restricted diet which shows promise in shrinking tumors. It is fairly involved

2015-07-29 Mycoplasma, lice and Skyller:

Hi Chinue,  A rat that young does not usually have symptoms of mycoplasma yet, but will have a secondary bacterial infection. I'm glad the Cosumix helped her because in many cases the antibiotics in that

2015-07-25 PLEASE HELP ! Unsure what to do:

Hi Chinue,  What looks like hiccups is a sneezing jag caused by the mycoplasma respiratory infection. Sometimes they make an audible noise, but not always. The reason I know this is because lab rats, who

2015-07-24 Follow-up: Re: cage&cats:

Seems like the scent ought to fade eventually. And rats who are afraid of cats can get used to them and their scent and get over their fear. You'd just have to see how it goes. Maybe try a product that


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