Err does anyone know how to do this emptying of anal glands? Thanks CLKD for thinking of that

I thought I'd share this with you all. Was in Florida some years ago and was looking at a newspaper. In the 'dogs for sale' section was this; For sale; cross between Shihtzu and Poodle, lovely Shiht Poo puppies! Honestly I laughed so much but what else could you call them?
Anyway, anyone with any experience of anal glands in dogs only, please let me know!