Two Easy Ways to Start Earning Rewards!
Earn 2X Pals Rewards points at Petco
when you use Petco Pay!
Updated on September 23rd, 2025
Pet's info: Dog | Shih Tzu | Male | neutered | 9 years and 6 months old | 12 lbs
My 9 year old Shih Tzu Romeo got all of his annual vaccinations on Thursday, two days ago. He also took Simparica on Friday for fleas. He is itchy which is why they’re treating him for fleas. He seems to be feeling ok but he pooped 4 times today which is out of the daily normal. It’s not Diarrheal. Vet gave me Endosorb in case needed and recommended half a Benadryl. Could the vaccine or flea med cause increased pooping or itchy? Is it safe to give him it if he just got vaccine and flea medicine?
1 Answer

Answered By Dr. Melanie, BVSc MS
Veterinarian
Published on August 13th, 2022