calculating this...
Started with full tt whip, i.e. 204 ped.
Burned off 3 peds to get it down to 201.04 taming the bristlehogs at Sweat Camp beach tonight...
Skill gain - pet and taming unlock started at 47.7% on the prerequisite bar.
at the end it was at 54.7%.
so 7% raise in 3 peds of whip roughly... not exact science since a few of them did die, but on average most were tamed.
Getting all of these pets to unlock could take a while and cost a bit... not just in nutrio, whip decay, etc. but in time.
As far as the autoloot unlock on the oratan goes, it's going up roughly .03 % or so on the bar for every loot pill popped... and it only seems to go up when your avatar eats the pill, not in the act of actually auto looting when the pill is active... I have several pills from buying webshop boxes, but from tt each pill is 50 pec... so unless there's some 'trick' to it it's roughly 3 pills per percent (at .5 each that's what, 150 ped or so for 300), and will cost roughly 300 or more hours of in game time since each pill lasts an hour and you have to be logged in to burn it off since timer freezes on log out.?... Support says that it's acting correctly?... and that's just to get past the prereq bar, not counting actual time in leveling up to meet level requirements. I guess you could log in eat pill, and walk away, but that seems like a waste of ped and time... if you eat the pill you may as well go down the rabbit hole.
. So, after many trials and errors of doing different activities with my Blue Atrox pet (by then the level requirement was aquired/met, but the criteria % had not been met yet - Stuck), tried hunting, mining, crafting, sweating, doing many various tricks, traveling, taming, and on and on....the % criteria did not even budge to my dismay :/! Eventually I stumbled upon that eating any loot pills helps to boost up the % criteria for unlocking the Auto Loot buff and thus it finally worked (guess it goes with the actual pet buff after all - irony or coincident?). 
Not sure if this would help, but I do own a Blue Atrox Pet (Auto Loot Buff Unlocked).
Anyways, I remember when I was leveling up my Blue Atrox pet and even had about 10% leveling up left to go on the level in which the Auto Loot buff was aquired...I was puzzled as my % criteria for Unlocking was still stuck at 79%
Note: consuming and using up the time (% increase will be added once pill runs out) on any auto loot would vary the % increase ranging from 3% to highest I think I got on % boost of up to 8%. Recommend not using the red autoloot pills from boxes and use the ones from TT in order to have shorter times on waiting for auto loot pills to wear out.
Didn't mean to type a novel here, but wanted to help contribute to any one who owns a Blue Atrox pet and is stuck on unlocking the Auto Loot buff upon reaching their pet's required level and unable to boost up the criteria % for unlocking.
Cheerz,
Vi
