If you're as old as I am you'll remember the salmonella crisis 30 years ago. Lion-marked British eggs are the way forward for pregnant women and children, raw or boiled with a soft yolk remaining. Whoop ... whoop... So a big YES for raw eggs for our dogs too. 

https://www.theguardian.com/lifeandstyle/2017/oct/11/egg-safety-weve-cracked-it-britons-told-by-food-watchdog

The study below reveals how beneficial the membrane of the egg shell is in the management of join pain.

https://www.nutraceuticalsworld.com/contents/view_breaking-news/2016-08-24/study-finds-nem-eggshell-membrane-effective-in-canine-joint-treatment/1902

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