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My dog is constipated and crying after dewormer. Should I worry?

Updated on September 23rd, 2025

Pet's info: Dog | Shih Tzu | Male | 3 months old | 6.34 lbs

My dog's vet gave him cestal plus yesterday and he has trouble pooping today. He was trying hard to poop and crying and following his tail. Is that side effect of medication? Should I be worried?

1 Answer

Most Helpful Answer

Linda G,  MS, DVM

Answered By Linda G, MS, DVM

Veterinarian

Published on December 27th, 2019

Hello. If Nero was severely infested with intestinal parasites/worms, it is possible that the dead worms are causing a blockage. You can try feeding him a teaspoon of canned pumpkin with each meal as this can act as a mild laxative. Make sure there is no accumulation of feces at the rectum that can literally plug him up. Sometimes sitting in a warm bath of Epsom salts can help relieve a blockage, too. If he is still having problems passing feces tomorrow, please have him seen by your veterinarian. Thanks for using Petco Pet Education Center, formerly Petcoach.
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