I think the white hair when shed is just more noticeable to most people.
Really it all depends on the individual dog. Lucy my blenheim probably sheds the most and Jaspar blenheim and Leo tri, the least. They have very smooth flat silky coats. Almost no hair comes up when they are brushed. Tons comes off Lucy, and Tansy, B&T.
Some puppies 'blow' their coat -- they will drop a lot of hair all at once and this will be replaced by the adult coat. But neither of my two that I had from puppyhood ever did this, so again. it varies by individual dog/genes.
Really it all depends on the individual dog. Lucy my blenheim probably sheds the most and Jaspar blenheim and Leo tri, the least. They have very smooth flat silky coats. Almost no hair comes up when they are brushed. Tons comes off Lucy, and Tansy, B&T.
Some puppies 'blow' their coat -- they will drop a lot of hair all at once and this will be replaced by the adult coat. But neither of my two that I had from puppyhood ever did this, so again. it varies by individual dog/genes.