Because loose hairs slip out all year round and there is no particular intense, heavy shedding cycle...AND because hairs are fine and long, they often fall back into the coat. This is why shedding is not often noticeable.
When you may notice them is during bath time or afterward when your are brushing and combing through the coat. This is because instead of falling to the floor, a great majority of them fall back into the coat. Then when you are grooming, they will be pulled up by the brush. This is why grooming
is so important. If not pulled up and out, they would keep piling up and become entangled with the live hairs, resulting in knots and matting.
Using a bubble tipped pin brush, be sure to gently go down into the coat enough so that you are reaching the skin and then sweep down and up, to grab hairs that have shed. Some owners worry when they see hairs in the brush, but this is not a bad thing...It simply means that you are indeed reaching down far enough to grab the dead ones and free the coat to be cleaner and healthier.
Another time that there may be Yorkie shedding is for a female during/ right after heat and following pregnancy
. Hormonal changes will effect the whole body, including the coat. It is not unusual for there to be changes in the thickness of the coat due to extra loss during these times. With normal, healthy dogs there is no need to be concerned....After the shed, the coat will grow back in. If there is a thinning that is noticeable, you will want to take a bit of extra care so that the skin is not affected....
This means that you may need to place down soft baby blankets so that your dog has a nice, soft cushion if the elbows are exposed. Sunscreen should be applied to any areas in which skin shows if you are to take her outside for any longer than 15 minutes.
Use a quality, moisturizing canine shampoo and conditioner
.... If skin looks irritated, an oatmeal based formula works well. When grooming, be sure to mist a leave-in conditioner on the coat so that hairs are not tugged when you brush and comb
and the fine hairs have protection from sun, wind and dry air damage.