Feline leukemia virus (FeLV) and feline immunodeficiency virus (FIV) are retroviruses with global impact on the health of domestic cats. The two viruses differ in their potential to cause disease. FeLV is more pathogenic. and was long considered to be responsible for more clinical syndromes than any other agent in cats. https://parisnaturalfoodes.shop/product-category/nutri-sea-omega-3/