If you've ever seen "Dogtanian and the Three Muskehounds," Guido and Maurizio De Angelis' theme song will be stuck on your memory for the rest of your life. The show itself, from the same Spanish folks that gave us "Around the World with Willy Fog," was - once you get past the fact that all the characters are animals (mostly canine, with some exceptions - Milady was a cat for instance) - a pretty straight-faced adaptation; like "Muppet Treasure Island," it didn't make fun of its source, and all the better for it.
You do wonder why D'Artagnan was renamed Dogtanian (all the other Dumas characters kept their names), but the spirit of the story was retained and the message of friendship and loyalty came through true and clear - without any need to spell it out for the audience, DIC and Filmation please note. The animation wouldn't win any prizes, but neither was it as bad as some higher-profile companies (yes, that means Filmation again... now out of business, by the way). No one will rate this above the beloved 1970s version with Chamberlain, Reed and Co., but "The Musketeer" is likely to be less effective than this. The 1993 version, on the other hand, IS less effective than this.
Footnote: Although the English-language title and the theme song refer to "Muskehounds," Athos, Porthos and Aramis are referred to throughout the entire series as "Musketeers." I've heard of something getting lost in the translation, but this is ridiculous.