I use lots of collars on Fido ! Both thick and sturdy leather collars or thin nylon collars.
I reccomand using a cat collar if she gets her collar stuck somewhere, if she isn't peeking everywhere and getting her collar stuck then its okay to use a normal dog collar
Its best to use just normal nylon collars inside, watch out for not having it too tight and not too loose ! Have it that tight that you can't pull it off her head but not tighter, when its a bit loose but doesn't get off the head its perfect