The term "allergic animals" refers to animals that have an adverse immune response to certain substances, such as pollen or pet dander. Full definition
Just one flea bite can trigger an allergic response, and often allergic animals do not have visible fleas on them. (hartz.com)
Note that just one flea bite can trigger an allergic response, and often allergic animals do not have visible fleas on them. (hartz.com)
Because it takes only one or two bites for a flea allergic animal to start itching, it is best that you be consistent with flea control products. (laurelwoodvets.com)