Hm.I think it's allowed,as long as there's a /good given reason/.EG:A dog-it's owner gave it to it,and it wears it like a collar.Or your fursona's,they're usually allowed but ONLY if they don't have excessive accessories,thats just...sparkledogish.

It isn't allowed.

This is Steet's word on that.

"Sparkledogs (Sparkledog is a term for an animal character, popularly a wolf or dog, which has unnatural colors, strange, usually clashy markings, excessive 'human like hair' and often a large amount of accessoiries"

necklaces are allowed as characters in Balto wears them necklaces or collars, they are realistic so yes