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Yes, it is an important thing to consider, because Googlers repeatedly told that if the canonicalized page and the canonical are very different, then Google may not take into account the canonicalization.

That makes sense.  Thanks

Second confirmation ;-), he's right. It's one of the things that for bigger sites really could get you in trouble.

Robots.txt!  That makes sense.  I'll do that. Thanks for your response.

Hi, I just checked my existing Disavow.txt file and the SEO company we hired to put us in this mess we're in had previously added secretsearchenginelabs.com to it.  I should have checked that file before i posted my question.  My apologies and please disregard.

Hi, I like that.  I think that I'll adapt it to insert a nofollow rel into the link in question on pages other than Site A's Homepage. Thank you for your help.

I appreciate that, thank you.

Hi, Thank you all for your knowledge.  I now feel better equipped. Cheers

Hi, That makes sense. Thank you for your help.