Weight loss after Fish Oil in dogs

52 reports to the FDA describe weight loss in dogs given Fish Oil. That is 3.4% of all reports for this medicine, compared with 1.7% across reports for all dog medicines, so it is reported unusually often with this medicine.

52Reports
73%Marked serious
12%Recovered
25%Died or euthanised
43 daysTypical onset
SponsoredWorried about your pet? Ask a veterinarian online, 24/7

How soon it started

Same day
2 7.1%
1–2 days
2 7.1%
3–7 days
5 18%
1–4 weeks
4 14%
Over a month
15 54%

How the animals did

Recovered
6 12%
Still unwell when reported
27 52%
Died
3 5.8%
Euthanised
10 19%
Not known
6 12%

Problems reported at the same time

Age of the animals

Under 1 year
0
1–3 years
3
4–7 years
13
8–11 years
24
12+ years
12

About this medicine

Type: medicine.

Questions owners ask

Can Fish Oil cause weight loss in dogs?
52 reports link the two, but a report alone does not prove the medicine was the cause: other illnesses, other medicines or coincidence can be involved. Your vet can judge it for your animal.
How soon after a dose was it reported?
In half of the reports with dates, it started within 43 days of the first dose.
What should I do?
Don't give another dose until you've spoken to your vet, and keep the packaging so you can tell them the product and dose. Your vet can also report it to the FDA (or you can, through the manufacturer or FDA form 1932a).

Weight loss with similar medicines

All reported side effects of Fish Oil in dogs · Medicines most reported with weight loss