Now I am reporting on Xephyr (accidently said it was Quell.... I got the names switch with my Paladin)
I went into the Badlands to see if I could find Barnabus. You indicated that he came up several times for me to tame, so I was going to at least look for him. I had set up NPCScan to detect him and started to ride through his spawning points.
With the first pass, I did not see him. A BG became available so I went in. After I came back out, I did another pass through the badlands to see. NPCScan did not go off, and I did not see him visually. I decided I wanted to check the Addon because sometimes when I put it a new search, it tags that list as cached. So I had stopped and opened up the Addon. Sure enough I see that it is tagged as Cached.
As I sit there looking at this, I hear that my Elekk is grunting like we are being hit. I thought wow what a brave creature it would be to try and attack me. Low and behold when I closed NPCScan... that creature was non other but Barnabus himself. I think he was telling me.. Quit looking at the Addon and come tame me. He must have just spawned, and I was right in his path. I also think this triggered my like for him. We clicked immediately. The worg model is not my favorite wolf, as I like the old world model, but I just liked him as soon as he was by my side.
I am a BM hunter.. Level 50 (51 now with this test)
* Try tanking an 80 elite with your pet
Only elite we took on was a ninja devilsaur that came up from behind while we were leveling. He was 4 levels higher than me and we gave it a good try. It did not take that white beast to long before he killed Barnabus, and then me. I could not outrun him. I did not find an elite we could try to take on.
* Level it a level or two
I also liked leveling Barnabus. As a BM, he held the aggro very well. What I found interesting was the fact that his health bar did not go down dramatically, even though we were taking on level 53 and 54 mobs. Only 1 time when I had him go after 4 of them in a row with out a break inbetween did his health bar go down to 1/2 without heal. Only stopped because I was low on mana. Never got him to the point where he struggled with a mob on the leveling part.
* Do a heroic
Did not do a random today.
* Do a battleground
This is what I have been playing lately. I set his talents to DPS, and loved watching him chase down my enemies growing red with anger. He does not have any special stun/slow capability, but it did seem to me that I was CRITing somewhat more than normal. I am a low level in the BG's right now, so I'm middle of the road with damage. I do like that the ferocity pets have dash, and he was fast to the targets.
* Check the pet out in different lightings
I loved his pretty orange/red color, and in the light, he was beautiful. When we got to the more dismal/rainy areas, he dulled down and the dark coat showed through more. Of course I liked him in the bright cheery areas.
* Check out swimming and possibly levitate animations (if any)
Doggy paddle sort of. More of a running walk under water. Not the best animation I have seen.
* Get a screenshot of you and your oddly fitting or entirely mismatching pet
Here is the shots that I have.

- WoWScrnShot_073010_062846.jpg (197.09 KiB) Viewed 1059 times

- WoWScrnShot_073010_062855.jpg (174.26 KiB) Viewed 1059 times

- WoWScrnShot_073010_062905.jpg (142.21 KiB) Viewed 1059 times
So, this was a great pet to try out. Didn't think I would like the worg model, but Barnabus told me right away that he was the one for me.