Ryder and Tucker both lost a LOT of hair for the first year ( you would be covered after holding them ) but it has slowed down now ( they are 18 months old now ) but they still lose hair . I brush them and have even changed their diets . The vet said there is nothing wrong with them that they just are losing hair like a human does . They are both purebred Yorkies . I couldn't say the hairballs rolling in my house are from them though .... we just blame the cat for those !
