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.
Prostate Specific Antigen Prostate specific antigen (PSA) is a protein that is found in the semen. PSA levels are used to detect prostate cancer and monitor the progression of the disease. A condition called benign prostatic hypertrophy (BPH) can also cause elevated PSA levels.