A nice poem, though I do have a few critiques...
Stanza 3: You changed the lines you were rhyming on. Not a good idea unless you carry the occasional switch throughout the rest of the poem, which you didn't.
Stanzas 5 and 6: No rhyme at all. If you plan on rhyming, try to do it consistantly.
Stanza 1: I loved the rhythm here and was dissapointed that it didn't continue throughout the rest of the poem. Your rhythm in general was rather hard to follow. You had good rhythm if the poem was taken stanza by individual stanza, but as a whole poem, the flow wasn't predictable.
It was a good poem, however, from a naturalistic perspective. You portrayed the wolf rather well. It was, however, lacking in a definate emotion. Right at the end, you caught an attempt at emotion. That would have come through much clearer had you played with the nostalgia bit more in previous stanzas.
~Keep up the good work!~
Who's that returning from the depths of forum ghosts past? Oh! It's me!