At more than 17 hands high, it is no wonder the Clydesdale Hamish has a healthy appetite.
"A lot goes in, and a lot comes out," explained his owner, Shayne Carter, an Exmouth local.
"He's probably put on about 150 kilos since I got him, and I'd say he's got another 100 kilos to go; he'll be about 600 kilos when he's fully grown," Ms Carter said.
She said Hamish had adapted well since moving to the warm climate of the North West last Christmas.
"He's used to the ocean now and you can't keep him out. He loves swimming," Ms Carter said.
She and Hamish feature in the new book Animal Tales (R.M. Williams Publishing, $19.95).
Although the big horse may have taken to the ocean well, Ms Carter still regularly clips his coat to help him deal with the heat. But she has given up trying to keep his feathers - the long hair around the lower legs - white. They are now always red.
"But I think it adds character," Ms Carter said.
Having Hamish has fulfilled her lifelong dream to own a Clydesdale.
"He was a spontaneous Christmas present to myself, funded by my husband," she said.
Clydesdales were incredibly gentle, despite their imposing size, Ms Carter said.
"They're like the labradors of the horse world."