The ASPCA also specifies âspecies suitable to be companion animals include dogs, cats, horses, rabbits, ferrets, birds, guinea pigs and select other small mammals, small reptiles and fish. However, many other governmental agencies, associations and interest groups insist that horses are livestock.
What Is Zinc PCA. Zinc PCA is also a trace element where the PCA stands for Pyrrolidone carboxylic acid. It has similar functions in general so in some cases it can be used in situations where Zinc cannot because of the different structure.
Zinc chromate. Zinc chromate, ZnCrO4, is a chemical compound containing the chromate anion, appearing as odorless yellow powder or yellow-green crystals, but, when used for coatings, pigments are often added. It is used industrially in chromate conversion coatings, having been developed by the Ford Motor Company in the 1920s. Contents.