Shedding of telogen vellus hairs can be either normal or abnormal. It simply comes down to how many are being shed. Provided less than 20 % of shed hairs are telogen vellus hairs one is less suspicious about androgenetic alopecia.
I discussed my 20% rule on the appearance of miniaturized hairs. The vellus hairs do not make up any significant part of the hair bulk on your scalp