I use salmon oil and have never had a problem...Laila loves it...I get it online from Timberwolf Organics...Barbara
Just last night I ordered a bottle from TO. I usually give Grizzly salmon oil but I am running low and forgot to order it when I ordered dog food and I will be out by the next time I order food. I decided to go with TO because the shipping would be free. (I am cheap :rolleyesPlus it is from TO, so I have confidence that it will be good stuff.