One of the things I love about Duolingo is the readily access to conjugating verbs and getting synonyms for words, along with verifying gender, which is really important in words ending in "e". Also the easily accessed group discussion usually answers any questions I might have.
Rosetta Stone sees itself as an "immersion" course, but of course it's not. I've taken a few immersion courses in college, and facial features and arm and hand movements are very much a part of immersion, along with voice tone and emphasis. Also, one RS gets past the first few lessons, the phrases speed up to what is supposed to be a conservational pace, which is much too fast for learning how to pronounce new words, especially for a beginner. RS does not have the "slower speed" button for dictation, which is so useful in Duolingo.
Once I get through the Duolingo course, I'll try RS again, to see if it has any real value at all.
To be fair: RS on-line offers about 30 session of 20 minute conversation one-on-one and live with a native speaker. That would help a lot, I suppose. Haven't tried it yet.
Have you ever tried to give milk to a horse? Given their susceptibility to colic, I don't suppose an experiment would be a good idea. Maybe just a tiny little bit, to see if they're show any interest when they smell it? They do drink mare's milk for a while. Cow's milk would probably be better for them than it is for humans (but I love milk and cheese and am not lactose intolerant).
Don't recall who posted this, but I saved it to my computer:
"Both 'B' and 'V' in Spanish have the same function. If you care about the specifics of the pronunciation, they are both pronounced after a pause or a nasal consonant (m, n) as a softer version of the English 'B' sound (try saying the letter B with your hand a couple inches in front of your mouth - if you feel a puff of air, try to soften the pronunciation until you don't feel that puff). Anywhere else (especially noticeable between vowels), it is pronounced as a sound similar to the English 'V', but instead of being pronounced with the top teeth and the bottom lip as in English, it is pronounced with both lips."