Yeah, I'll bring both if one has to go to the vet. But since they've been accustomed to the carrier, they now get very fussy once inside instead of scared, which results in them attempting to chew the plastic. The carrier I'm using is a dog carrier, so the walls are plastic with a metal door. Are there any fully metal or chew-proof carriers that aren't extremely expensive? It'll be a while until they go back into the carrier, hopefully a year unless heavens forbid we need to take them to the vet sooner, but I'd like to get a different carrier at some point.