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Dog sick, dry heaving after PetArmor flea collar. Can I use drops?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Small (up to 22lb) | Female | spayed | 11 lbs

Hi, I bought my dog flea collars (PetArmor) and one of my dogs is relaxed with minimal itching but the other started dry heaving, refusing to eat or drink water, crying (actual crying) and vehemently itching at her neck. We removed the collar and bathed her really well and she started eating but is still dry heaving off/on, whimpering now and itching at her neck aggressively off/on.. I’m sure the fleas from my other dog are probably attacking her and I am able to get her the flea drops, is it ok

1 Answer

Most Helpful Answer

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Answered By Laura Johnson VMD

Veterinarian

Published on March 24th, 2018

Hi, thanks for using Petco Pet Education Center, formerly Petcoach! Poor Suki! It sounds as though Suki is having a severe reaction to the PetArmour collar. The scratching may be from the fleas or from her skin burning from the collar. I am glad she is eating but the dry heaving concerns me the most. It is best for Suki to see your Vet today and have medication provided to stop the allergic reaction to the collar. I would do this before you apply anymore OTC flea products. Read the instructions on the product you purchased, some ask you to wait 2 days or longer after bathing. I would wait until Suki is 100% normal before starting any other flea drugs. You can start a bland diet for the dry heaving. Feed 1 cup per 20 lbs of boiled chicken or hamburger mixed with rice for 3-5 days. If she still continues to dry heave she really should see a Veterinarian. I hope this helps and I wish Suki a speedy recovery!

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