I personally would definitely consider something in the diet as a potential cause of your pup’s issues (but not “meat” in general). They are now finding that food sensitivities and allergies can trigger a WIDE range of symptoms. As an example of how diverse symptoms can be, they have discovered that gluten (which is a protein) causes “cramping” in Border Terriers “Canine epileptoid cramping syndrome in BTs is a gluten-sensitive movement disorder triggered and perpetuated by gluten and thus responsive to a gluten-free diet.” http://www.ncbi.nlm.nih.gov/pubmed/26500168
It might be worth trying an elimination diet however it is often beneficial to have a vets assistance with this as even though the pup seems to be feeling better in general, symptoms can actually get worse short term. Even after the offending food, if that is the problem, is eliminated, the body has to get rid of the histamine etc that was elevated by the problem food — which manifests as symptoms.
Regarding the fish oil / tochopherol comment – tochopherol is simply vitamin E. I have read however that the source of the tochopherols can be problematic as much is sourced from soybeans. For those that react to fish oils with added tochopherols it might be worth investigating if the vitamin was sourced from soybeans.
