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Dr. Bruce
Dr. Bruce, Veterinarian
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Experience:  15 years of small animal veterinary medicine
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My dog started to have diarrhea. His poop looks like water,

Resolved Question:

My dog started to have diarrhea. His poop looks like water,
and his butt had little bit of blood stain.
He still has an appetite.
We recently took trip to a lake, and he drunk a lot of water from it.
I am wondering if he got some kind of parasite.

Is there anything I can do to stop diarrhea?
what kind of treatment is available in vet offices?
How much it costs?

Thank you.
Submitted: 7 years ago.
Category: Veterinary
Expert:  Dr. Bruce replied 7 years ago.
Hi hynt punk,

Welcome to Just Answer. Can you help me with a couple questions?
1) What breed is your dog?
2) Any vomiting?
3) How long ago was the trip the lake?
4) Any medications he's currently on?

Dr. Bruce
Customer: replied 7 years ago.

My dog is Welsh Corgi Pembroke.

He has not vomit so far, and he is still very active (I even played fetch with him this morning).

We went to the lake this Sunday and yesterday.

Yesterday, my dog licked water from a tiny pond which had mosquito babies while I wasn't looking...

He is not taking any medication now.



Expert:  Dr. Bruce replied 7 years ago.
Sorry for the slight delay.

The most common parasiste that dogs and people too can get from a water scenario - lakes, streams, puddles - is giardia. This is a protozoal organism that can live in the water and if ingested, live in the gastrointestinal tract of your pet. Once there, it can cause nausea and diarrhea.

It is an organism that can be diagnosed by examining the stool under a microscope or with a swab ELIZA test of the rectal mucosa - it looks for the giardia antigen. Both of these are fairly simple and not too expensive of tests - honestly they shouldn't be too expensive $20-40.

As far as you doing something at home for the diarrhea. You can feed a high fiber or bland diet. The one at home diet that I recommend a lot is boiled rice and chicken - 1/2 cup to 1/2 cup. 1 full cup per 20 pounds of pet.

At a veterinary office, they have very good high fiber foods that I use a great deal to help get the stools to firm up quicker. As far as the actual treatment for the diarrhea. If it is giardia, they can prescribe an oral medication - fenbendazole to treat it - 5 days is the usuall treatment course and not expensive either. If there is no giardia - then a lot are treated with a course of metronidazole - an antibiotic to help get the gut flora back into check. This is also not an expensive antibiotic.

Here is a great link on giardia.

Dr. Bruce
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