DNA Testing Horses

When Epona was born, we got preoccupied keeping her alive and didn’t get her registered with the APHC. Four years later, we are starting the process and it begins with getting her dam’s DNA. 

I paid for the kit and it was emailed a week later with the instructions to send 75 hairs with the root bulb attached. (Photo above). 

I took the samples from her mane and pulled straight up as close as I could to the roots. She didn’t seem even slightly concerned. 

I truly can’t tell, however, if there is enough of the bulb in this sample. 

Should I pull tail hair instead?

I know some of you have done this before, but this is my first time. Any help would be appreciated.