2-month-old puppy has loose yellow poop after deworming. Is she okay?
Hello and welcome to Petco Pet Education Center, formerly Petcoach.
Loose stools can be a sign of various different conditions. These include parasites/worms, other infectious agents (coccidia, giardia) poor food quality, viruses, bacteria from eating garbage or raw meat, food intolerance/allergy (less likely in such a young puppy), or underlying organ diseases such as liver disease, etc.
Since Europe is happy, healthy and eating, the most likely cause is either that you are feeding raw meat, or even more likely, a worm that wasn't covered by your dewormer.
I recommend you have a fecal sample taken to your vet to check it for eggs and other things like coccidia and giardia. Treatments for these are different so getting an answer is important.
Best of luck with Europe!
Updated on September 23rd, 2025