"And since then he's turned into a monster duck, he's almost the size of a goose."
Juliet's name changed to Julius, then again to Frankenstein, "because now he's a bit evil", she said.
In the last few days, the duck has become territorial and had a couple of goes at Romeo.
"But that's just his nature. He's just trying to mark his place and unfortunately he's been taking it out on Romeo." Mrs Loughlin said.
She was amazed at how fast the duckling turned into a fully-fledged duck. She's even had to buy a special container to put him in because he's too big for a normal cat-sized container.
"The other day he was running across the lawn flapping his wings, trying to fly, and Romeo was around so he had his neck stretched out and he just kept going and ran into him."
"And now he's starting to quack and that's come on in the past week. Instead of a baby chirp it's a croaky beginning of a quack. It's so funny," she said.
The stroppy teen lives in a land of luxury in Mrs Loughlin's back lawn but he is set to return to the Te Puke farm he was rescued from.
Mrs Loughlin said she would be sad to see the duck go but said he would have a better life at the farm.
"There's ponds there and there's other semi-rehabilitated ducks. There's a pair of paradise ducks up there and a female duck so there's a chance that he might be really happy there," she said.
"It's been an amazing experience and I've had heaps of fun watching him grow. People have asked if I'm going to buy orange sauce and have him for Christmas but no, I won't be doing that."