I have 3 Semogue boars, 1305, 620, & 1470. Each one has shed only a half dozen bristles & I use them in a regular rotation.

i also have a Koh-I-Noor SC-68, it too has hardly lost any hair. This is quite a big brush & is fantastic with creams.

i guesss there is a case of the luck of the draw with Omega's. Loads of fella's use them, only a few complain of excess shedding.

I am not sure if using boar brushes in a rotation makes any difference;allowing each one to dry thoroughly before its next use.