Tinned sardines are our stand-by food for Penny when we've accidentally run out of the raw meat diet we obtain from Barking Good in East Ivanhoe.
We did try the raw sardines sold in that shop, but for some reason Penny wouldn't eat the non-tinned variety.
She get sardines about once a week, and I was pleased to read this article on Dogster about the benefits of this food.
We've always aimed to feed her only wild-caught fish, packed in fresh water. It's not always easy to obtain those, so we stock up when we see them, especially if they're on special.
One thing we will NOT buy is a tin of sardines (or any other seafood) from Thailand, because of the likelihood that the fish were caught by enslaved men. Penny's food, as far as we know, is not supporting the modern slave trade in Thailand.