Arsenick huh?? I SURE HOPE NOT. Anyways no there should not be any smell to it. My guess is your fox is rotting but maybe not. Probably wasn't tanned and was DP'd (unproperly). You can try some scent killer if its just the odor of a k9 (all k9s stink untill they are properly tanned or washed when DP'd) but if that doesn't work after awhile and it keeps smelling/rotting if that be the case. I'd take that thing back to the taxi right away if it continues to get worse. Good luck hope its alright. WCL