When my hair first began falling out, I had extensive blood work done to test my iron levels, hormones levels, and thyroid. (mindbodygreen.com)
There are varying blood tests available and our staff may make recommendations for more extensive blood work based on the specific surgery to be done, as well as the age and health status of your pet. (krydervet.com)
After extensive blood work, I learned that I had candida and SIBO (small intestinal bacterial overgrowth) which had caused problems that went all the way back to my childhood. (parsleyhealth.com)