I don't know if it's necessarily the SNOUT that's making it catty. Because if you look at some breeds of dogs, like Pugs and Boston Terriers and Pekingese dogs, they almost have NO snout at all.

I'm looking at this, and I'm thinking...the overall head shape, PLUS the snout (and some of its details--like the lips) make it catlike. Also, I think the positioning and shape of the ear is very catlike. Dogs can have very floppy ears.

If you go to www.google.com , and use the Image Search, you'll be able to find a ton of dog reference pictures.

Hm, what else... Some other things that might make your dogs look more dog: Make the nose really big. Or, rather, study dogs' noses, see what kind of shapes are in them. Most dog noses, though, tend to be bigger than cats' noses, and are more prominent and... like, almost a more separate element of the face -- cats' noses are smaller and aren't quite as much of a feature.

Also, maybe work on making the "lips" of the dog more loose. Cats have tight lips that make an upside-down heart-shape around their noses, then a little chin, then a neck (from the front, that is). Dog lips can be really really loose--think of St. Bernards, having those big floppy jowls.

Hm...so my other suggestion would be... Instead of trying to draw catlike dogs, or generic dogs, go to the other end of the spectrum, and try to draw the dogs that are the least like cats, dog species that have REALLY REALLY prominent, exaggerated, dog traits--like St. Bernards (have the loose lips, floppy ears, big noses), or Boston Terriers or maybe even Greyhounds or Chihuahuas.

Start there, then work your way towards the more "general" end of the dog spectrum of German Shepherds and Golden Retrievers.

Hope that helps! If you want a redline or any more suggestions, just ask!