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Why is my 6-month-old Pitbull aggressive and lethargic? Is she in heat?

Updated On September 23rd, 2025

Pet's info: Dog | American Pit Bull Terrier | Female | 45 lbs

I have a female Pitbull who is about 6-7 months old and lately she’s been really aggressive, sparking fights with her brother and she has been really down lately. She lays in one spot all day and doesn’t show any signs of excitement. Could she be in heat? I’m not sure if he vulva is swollen or not.

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1 Answer

Most Helpful Answer

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Answered By Dr. Elizabeth

Veterinarian

Published on June 19th, 2019

I would be suspicious there is another cause for the change in behavior. Swelling of the vulva happens early on in the heat cycle but everybody is different. With her age it’s possible she may not proceed quite as normal since she is young. It’s possible she does not feel well. It’s also possible she is starting to test her boundaries and where she fits in the pack hierarchy. Since she can’t talk and tell you, I recommend to have her examined by the veterinarian. If the veterinarian does not find any obvious source of pain, they may look into a bladder infection or anal gland infection as a cause for discomfort. It is always important to rule out medical causes. I hope this helps.

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