r/dogallergies • u/Emotional_Tea_3977 • 1d ago
Puppy getting hives 15-60 mins after eating (tried chicken, fish, turkey, & hydrolyzed)—suspecting marine/fish oil allergen? Anyone experienced this?
Hi everyone,
I’m looking to see if anyone has dealt with a similar situation with their puppy and can share what their vet or veterinary dermatologist said, or if you have any insights/strategies while we wait for our appointment.
The Situation:
My puppy has been experiencing acute, rapid-onset hives (urticaria) that pop up roughly 15 to 60 minutes after eating.
Our primary vet was essentially stumped because it’s happening across so many different foods. She advised us to pre-medicate him with Benadryl before meals until we can see a veterinary dermatologist (which helps lessen/block the reaction, confirming it's an immediate histamine response).
Diets We Have Tried:
He has gotten hives after every single one of these foods:
1. NutriSource Large Breed Chicken & Rice (Kibble)
2. Open Farm Salmon & Ancient Grains (Kibble)
3. JustFoodForDogs Fish & Sweet Potato (Fresh Food)
4. JustFoodForDogs Turkey & Whole Wheat Macaroni (Fresh Food)
5. Royal Canin Veterinary Diet Hydrolyzed Protein PS (Prescription Hydrolyzed Kibble)
What We Noticed:
When looking closely at the ingredient lists across all 5 foods, we realized there is only one common whole-food ingredient present in every single one: fish or marine-derived ingredients.
The salmon and fish diets use wild/ocean whitefish and salmon oil.
The chicken diet contains menhaden fish meal.
The turkey and hydrolyzed soy diets both contain fish oil for Omega-3s.
Other common allergens like chicken fat or specific grains vary completely across these foods, leaving marine protein/marine oil cross-contamination as our primary suspect for this immediate IgE-mediated reaction.
What We’re Asking the Community:
1) Has anyone had a pup allergic to fish or trace fish proteins in fish oils? How did your vet/dermatologist confirm it?
2) Did your dog react to hydrolyzed diets that still contained fish oil?
3) If you did an elimination trial with a puppy (who still needs DHA/growth nutrients), what diet or protein source ended up working?
4) Any specific questions or testing we should mentally prepare for before our dermatologist visit?
5) Any recommendations on Vet Dermatologist in the Bay Area? We received a list from our regular vet but wanted to see if anyone had first hand experience
Thanks in advance for any advice or shared experiences!