Very nice post.
The rats are even more pronounced than the cows.
Those rats look way more muscular.
I am a firm believer in genetics, I see it every day in fact.
Couple of black guys at my work started training and week to week I see results in them. They have natural muscular bodies and man they got strong very fast.
Some of these dudes are benching just under 400 pounds and they are smaller than me.
One guy that just started 4 months ago did 11 reps with 225 lbs on bench and he is probably maybe 160 pounds. He is a natural.
But he does seem a little short in the brain department

He is a nice guy though and was benching every day till I gave him some direction.