mynameis, this is exactly what I did for the Minfernal hunt. Level 58 is when you leave the starting zone, and it's more than enough for Felwood. I also got a CRZ mage friend to port me to Dalaran for easy portal access, and so that I could venture north to Sindragosa's fall. I died a couple of times, but there where Whelplings everywhere, so was well worth the effort!
Roll on summer
Edit: I've found that, despite the inherant risks, PVP servers tend to have more of the rare pets spawned at any given time. I got all of the harder to reach rare pets this way, from the Giraffe Calf right up to the Scourged Whelpling and Minfernals, but was only ever ganked once by a mad moo-cow outside Ony's lair. I ressed, he /pointed at a nearby whelpling, clapped and ran off