White beard growing on three year old lab

Hey all

My boy is 3 years old and realized in the past few weeks he has more and more white growing on his chin. I know the dad was yellow and the mom black......but is it normal he has so much just at 3 years old?

Thanks

 

Yes normal, it's all in the genetics. Some go grey early like my eldest who was showing grey hairs on his chin by 2 yrs old, others start around middle age and a few will never have a grey hair.