I could see the arguments for 3, but I can't see it working outside of an animated setting. Cause it's just furry human dwarf bodies with animal heads and human eyes. Which would take some serious getting used to if translated to real life.

4 is the Disney situation where they are all animal except for their "bedroom fuck me" eyes.

Gonna need some serious emotional investment to get through that one.

5 is just cow.

2 is fine, 3 is fuzzy. 4 and beyond is where I say no. If you were to go 4 and beyond, the Harkness test is strongly advised.