My dog had a tarry stool last week after taking a dewormer, should I be worried, or is this something that will pass?

Last week, after I gave my dog a dewormer, I noticed his stool was tarry and dark. I've read this can be a sign of blood, which has me a bit concerned. Could this be a normal reaction to the medication, or should I schedule a vet visit to investigate further?

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Answer

Dark, tarry stools in your dog after administering a dewormer might be alarming but could also be a normal side effect. However, it is essential to consider the possibility of blood in the stool, which should not be ignored.

  • Observe your dog's overall behavior and any additional symptoms.
  • Consider recent dietary changes or new medications.
  • Seek a veterinary consultation for persistent or concerning symptoms.

It is not uncommon for some medications, including dewormers, to slightly alter stool appearance. However, dark, tarry stools might indicate digested blood, which could be a sign of gastrointestinal bleeding or a more serious underlying issue. It is advisable to err on the side of caution and seek guidance from a veterinarian to ensure your pet’s health and safety.

Book a consultation with a licensed vet at Dial A Vet for just $49 AUD if you're unsure or symptoms are getting worse.

Frequently Asked Questions

  • Is a tarry stool always a sign of blood in dogs?

    Not necessarily. Some dewormers and certain foods can alter stool color. However, tarry stools could indicate digested blood, so it's important to consult a vet.

  • What other symptoms should I watch for if my dog has dark stools?

    Monitor for signs like vomiting, lethargy, loss of appetite, or abdominal pain, as these could indicate a more serious condition.

  • Should I stop giving the dewormer if I notice this change?

    Do not stop any prescribed medication without consulting your vet, as they can provide guidance based on your dog's specific circumstances.

If this is an emergency, please seek immediate veterinary care.

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