The Duke of Cambridge said his spaniel Lupo was "coping alright" with the new addition to the family.
Prince William said, "As a lot of people know who have got dogs and are bringing a newborn back, they take a bit of time to adapt, but he's been alright so far."
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The terminally ill boy's mother, Connie Yates, burst into tears as a lawyer reveals Charlie's latest brain scan makes for "sad reading".
Mr Spicer has quit his role as White House Press Secretary after six months, according to US media reports.
Prince George and Princess Charlotte explored a rescue helicopter before they flew home after a tour of Germany and Poland.