Salmon, on sale is $3.00 / can.
We used several types of fish oil but it can go rancid fairly quickly plus there were reports of it being less than pure.
I give Wellactin fish oil capsules
And Duralactin, a tasty tablet
Check the freezer section at your grocery store. I got three bags of frozen wild salmon for 9.00 a bag on sale. Each bag had 8-9 fillets.
Great to top dress food.