Fish oil is one product in which I don’t recommend trying to take the cheap way out. It’s important to only purchase high quality, human-grade supplements from reputable suppliers – avoid generic brands/store brands. Carlson’s and Nordic Naturals are two very good brands that I have used and would use again. You want to be sure your fish oil contains an antioxidant such as vitamin e or astaxanthin to help prevent oxidation. With the exception of the few companies that use airless pumps, I would avoid fish oil in pump dispensers (the pumps let it air and promote oxidation). Make sure to refrigerate the fish oil and dispose of any unused fish oil after 2-3 months (so in otherwise, avoid purchasing in bulk). I also testing the freshness every week or so, break a capsule open and smell it and squirt a little on your tongue to taste it. If it smells fishy and/or tastes extremely fishy (it will taste slightly fishy) it’s rancid – toss it! There’s also the option of mixing tinned sardines and/salmon into your dogs food for omega 3’s. This is what I usually do.
