HUH?!
1. God’s Salvation is for ALL men - a number of verses state this - it is an ESTABLISHED PROMISE
2. This was not literal ‘children’ and ‘dogs’ as you refer - but was metaphorical to the Children of Israel(Jews) and non-Jews
3. Jesus - Son of God, was not - ever - giving a ‘racial dig’ as we flawed judgmental humans do
Having said that, I believe Jesus was quoting ‘typical thinking’, traditions of men, caste judgments, and also stirring the woman to a greater exhibit of her faith - and therefore displaying to all that yes, God’s healing and forgiveness is for ALL people who trust in Him.
Not giving her food to the dogs.
http://www.freerepublic.com/focus/f-religion/3257158/posts?page=10#10