Behaviour change after Fish Oil in dogs

The FDA has received 90 reports of behaviour change in dogs after Fish Oil. That is 6.0% of all reports for this medicine, compared with 2.5% across reports for all dog medicines, so it is reported unusually often with this medicine.

90Reports
42%Marked serious
30%Recovered
11%Died or euthanised
42 daysTypical onset
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How soon it started

Same day
10 15%
1–2 days
8 12%
3–7 days
1 1.5%
1–4 weeks
9 14%
Over a month
37 57%

How the animals did

Recovered
21 23%
Recovered with lasting effects
6 6.7%
Still unwell when reported
30 33%
Died
6 6.7%
Euthanised
4 4.4%
Not known
23 26%

Problems reported at the same time

Age of the animals

Under 1 year
2
1–3 years
19
4–7 years
18
8–11 years
28
12+ years
22

About this medicine

Type: medicine.

Questions owners ask

Can Fish Oil cause behaviour change in dogs?
90 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 42 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).

Behaviour change with similar medicines

All reported side effects of Fish Oil in dogs · Medicines most reported with behaviour change