i know this comic because i'm the founder of the group Zootopia-comic-zone, and this comic is in the group because i asked the person if she wanted to show her comic in the group, and she accepted, so i know this comic, the title is "Tired", and yea, they can't really show emotion, so if they can be really happy, how can they make kids if they are shocked when they want kids ? because they are happy to make kids, so i wonder how Nick got a kid named Marcus if he can't be happy, i think i just found the problem of the tame collar on predators XD