Linoleic Acid has 18 carbon atoms and is called Omega6 Fatty Acid. Arachidonic Acid is has 20 carbon atoms and is present only in animal fats. An OIL is a lipid substance that is liquid at 25 C which is 77 Fahrenheit. Oils are liquid at room temperature and usually are polyunsaturated. A FAT is a lipid substance that is solid at 25 C which is 77 Fahrenheit.
Fats are solids at room temperature and are usually saturated.
EFA stands for Essential Fatty Acids. An Essential Fatty Acid is one that an individual must ingest in order to survive. All the essential fatty acids are polyunsaturated. GLA is gamma linoleic acid which is the active form of Linoleic Acid. Without enough linoleic acid dogs and cats may experience dull, dry coat, hair loss, greasy skin and increased susceptibility to skin inflammation.