Is y a vowel in the word your, canyon, and pretty?

I'd say that Y is a vowel in "pretty." In "your" and "canyon," it
functions as a consonant.

Whilst I agree with pinkfreud, it only needs a small change of
pronounciation to make it a vowel-sound in every case. Try saying out
loud "canion" to see what I mean.

Furthermore, canyon is from the Spanish "can~on"  (the squigly thing
is supposed to be over the N), with the spelling adapted to
approximate the Spanish pronunciation.  Hence, the Y is not a vowel in
the word.

canyon Look up canyon at Dictionary.com
    1834, from Mex.Sp. caņon, extended sense of Sp. caņon "a pipe,
tube, gorge," from cano "a tube," from L. canna "reed" (see cane).

I'd say that 'Y' would only be considered a vowel in words where a
'traditional vowel' (A,E,I,O,U) isnt present such as my, why, thy, so
on and so forth. in words like pretty, your, and canyon there are
vowels present.