"The gravy in it looks beautiful," he said.
"When I give it to my dog, I find myself involuntarily salivating and feeling like I could just about get into it."
This time he did.
"I had a fork in my hand and I just thought 'I'll take a bit' and it tasted quite good," he said.
Milne said it passed the taste test, but he was less kind to the texture.
"It didn't have a nice, chewy texture - it tasted exactly like the casseroles I make, where I nearly always overcook them slightly. And it had a slight dryness to the meat."
But if he was a student, he said he'd be tempted to "shove it in a pie".
"I've been dealt up meals in restaurants that were worse than that. It's much nicer than your average service station pie."
And as a meal, it had just about everything, he said.
"You've got peas and everything else in there as well, so you've got your vegies catered for."
The ingredients listed on the 1.15kg can included peas, carrots, vegetable protein, meat by-products, and meat derived from chicken, lamb, beef and mutton.
"They could possibly chuck in some spuds, would be quite nice," he said.
Milne said he didn't feel unwell afterwards, even though the can said the dog food was not intended for human consumption.
"I wasn't all that hungry, but if you were hungry I think you'd find it quite a nice filling meal. It'd probably kill you, but it'd be a nice way to go."
Milne said his "fairly silly" Thursday slot on Good Morning covered a range of topics and was a bit like show-and-tell.
"I've spent the last 27 years criticising stuff on Fair Go, and it's kind of nice to be able to go on air and actually say 'Look, have a look at this - isn't this interesting'."
