The general consensus for xenofiction tends to be that the animals being animals (or at least non-human) is an integral and core element to the story - that telling that story would be effectively impossible with human characters.
Dinsey's Oliver Twist, obviously enough, fails to count as xenofiction, and I suspect the Aristocats might fall under the same umbrella. But I forget some of the details, so maybe not. I'd say it's probably an edge case.
I thought sentient animals and furries were different things.
It can be - it usually isn't. Furry is essentially "humans with animal traits" or, less commonly, "animals with human traits" - anthropomorphism. It is possible to have sentient animals that are not furries - The creatures in the Uplift War series would largely qualify, here, as would Ecco the Dolphin. Xenomorphs would be an edge case - few would consider the animals they change into to be furries, despite having clearly human intelligences. But that's generally more rare than the alternative.
"Furry" is generally the addition of human characteristics, so cases like The Lion King would be pretty clear-cut. Not only do the animals have human intelligence, they have human expressions, human-esque social structures, and human behaviour. Other cases are significantly less so - it's hard to draw a hard line between "intelligent animal" and "anthopormorphic animal".