It's been my experience that Kita (older altered female) has a larger coat blow twice a year, but the whole coat doesn't release at that time, only some of it. The rest of it comes off is small sheds throught the year. Taiko on the other hand (older not altered male) does a massive coat blow twice a year that lasts about 2 weeks and between those coat blows I can't get much off him. I've been told the altered vs. not altered hormones contribute to this, but there could be some male vs. female diffferences as well. Coat type could factor in as well. Taiko's coat is a bit harsher than Kita's more plush type coat.
Either way, shibas shed and it's very bad twice a year (for me it's around Christmas time and early summer), but year round I have fur on my clothes. Course, I have a cat too.
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Chelle and the rest of the crew including, but not limited to Kita and Taiko (the shiba inu wrestle maniacs), Adi (reserved and dignified tabby cat), and all 28 reptiles www.freewebs.com/performanceshibas