You know, all my life I hoped this would happen. Ever since childhood I expected it. I knew these creatures were alive somewhere, but I had no proof, scientific proof, and I had to keep it to myself, or my colleagues would have all laughed at me. -- Dr. Sampson, The Giant Behemoth
This site used to have an entry on Blink Dogs, and at the bottom was a little chart on Animal Control difficulty levels which i thought was neat. Unfortunately, the page is now gone, but i found it archived on google. Preserving the chart here in case the google cache goes away as well:
do not attack me
move out of the way
allow me to pet you
allow me to hold you
return to me if lost
attack anyone attacking me
attack on my command
go get help and return
Right now i've got a player with a baby griffin and she's training it. I've got her naming specific "tricks" that she can teach it, using rules around how long it takes to learn a trick and how many tricks can be taught at one time. A graduated scale like in the table above would probably make things a lot easier.
I'm assuming this is some D20 thing (the numbers are otherwise meaningless to me), but it's a good concept and i'd like to adapt it to all proficiencies. I could imagine myself creating charts like this for every relevant proficiency if all my nerd-time wasn't currently devoted to my comics timeline, but i suppose i should look and see if someone's already done so. Would probably require a 'D20 to 1st/2nd Edition' conversion, though.