Confusing expression in "The Hobbit"
Hello, everyone! I've already looked through the definition of the expression "There is a good fellow", but I still haven't found any suitable answer - suitable for this context - "Put on a few eggs, there's a good fellow!" Does it mean just "please" in this context?
Context:
“Now we are all here!” said Gandalf, looking at the row of thirteen hoods—the best detachable party hoods—and his own hat hanging on the pegs. “Quite a merry gathering! I hope there is something left for the late-comers to eat and drink! What’s that? Tea! No thank you! A little red wine, I think for me.”
“And for me,” said Thorin.
“And raspberry jam and apple-tart,” said Bifur.
“And mince-pies and cheese,” said Bofur.
“And pork-pie and salad,” said Bombur.
“And more cakes—and ale—and coffee, if you don’t mind,” called the other dwarves through the door.
“Put on a few eggs, THERE'S A GOOD FELLOW!” Gandalf called after him, as the hobbit stumped off to the pantries.