Whole Dog Journal, digital edition
This is a highly recommended publication -- required reading according to lots of cavalier owners (well, and other dog owners too... :) ).
I just discovered they do a digital edition of the magazine and it is available at a discount to the print edition, at $16 for a year compared to $20 for the print version. I signed up right away! I prefer digital to print. You also get access to all their archives plus this is the bargain of the century for Europeans as the exchange rate makes this a piddly â‚¬12 or so, and only about Â£9...
If you are a print subscriber you get web access as well of course.