He'll grow into it on his own. Those sleepless puppy nights are hard (we've all been there) but they do pass. He'll be sleeping through the night by the time school starts. Welcome to YT!
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"If you have men who will exclude any of God’s creatures from the shelter of compassion and pity, you will have men who will deal likewise with their fellow men." — St. Francis of Assisi, 1181-1226