Now we just paint the failing heart. Water-based semi-gloss finishes are preferred unless contraindicated.

To be a little serious, you need to shave them first. Which they may object to a bit. And you’d need a lot of different sizes of bespoke safety razor!

I would suggest 3D surface topography with scanners and then basic 3D software.

Right,the proportion of total brain volume as function of different areas’ enlargement matters a great deal. Thus, brain size comparisons at some point need to be done within higher-order but not too-higher order taxonomic groups (i.e., within simian primates, or within major groups of rodents, etc.)

One of the interesting ‘brain size’ discourses is to do with the seemingly disproportionate proportion of brains used to deal with senses through organs and body parts of particular utility to the owners, like hands with humans and and the nose and whiskers of burrowing animals.

Given one of Dawkins’ diversions in this book, as mentioned in the review, it is probably fortunate that Dawkins put this book to bed before the advent of Trump as POTUS.

#2 does not overcome the fur & feathers problem though.

Surface area of an animal with feathers almost becomes a problem involving fractals (ever carried out macro-photography of a feather) — now there is an idea.