Does the Mighty K9 expiration date exist, and how do you judge freshness?

Not on the label panel image. The panel shows the serving, the Guaranteed Analysis and the ingredients. It does not show an expiry date or a best-by date.

That is a gap, and we say so plainly. A bottle may carry a date printed on the label, the box or the glass. Our batch page tells owners to look for a best-before date if the bottle shows one.

So the first job is to check your own bottle. Turn it in good light. Look at the label edges, the cap and the base. If you find a date, photograph it and keep the photo with your order email.

Oils change with time, heat and light. The main base here is extra virgin olive oil, and olive oil can go stale. A stale oil smells sharp, sour or like old paint.

There is a second reason. C60 in olive oil has been shown to react to light. In a 2021 mouse study, C60 oil left in strong light for 4 to 8 days became toxic, and 25 to 50% of the mice that got it died. That was strong light and a different product, but it is why the label says to store the bottle cool and dark.

So age is not the only thing to watch. How the bottle was stored counts too. A bottle left on a sunny sill may be worse than an older bottle kept in a cupboard.

1. Write the open date

   Use a marker on the bottle or on the box. Put the day you broke the seal.

2. Note any printed date

   If the bottle shows a best-before date, add it next to the open date.

3. Photograph both

   Keep the photos with your order email.

4. Check at day 30

   At 2 mL a day, the bottle should be empty at about 30 days.

The 30-day rhythm helps a lot. One bottle is used up in a month, so an opened bottle rarely sits for long. If you buy a 3-bottle or 6-bottle pack, open one at a time and keep the sealed ones closed and in the dark.

Stop giving it and keep the bottle. Do not pour it away until the matter is settled. Take photos of the label, the codes and the oil.

If your dog is unwell, call your vet. If you want a refund, call the order desk with your order ID. The money-back window on the sales page is 30 days, and it counts empty bottles. Count from the order date to be safe.

You can also report a problem to the FDA. They ask for the lot number and the best-by date, so the photos you took will help.

It does. A 3-bottle pack covers 90 days and a 6-bottle pack covers 180 days at the label serving. The last bottle in a 6-bottle pack may not be opened for 150 days.

So check every bottle when the box arrives, not only the first. Look for any printed date, smell the oil at opening, and keep the unopened bottles sealed, upright and in the dark. Use them in order.