Careful with taking the bone away - that actually TEACHES resource-guarding (food aggression, growling, whatever you want to call it) - it's a common misconception. The best thing to do, especially with wolf hybrids, is "trade up" - approach with something BETTER than her bone (a piece of chicken, a treat, etc.) and as she drops her bone for the treat, say "drop it", and gently pick up her bone while she is munching. After she eats the treat, give her back her bone.
This not only teaches her "drop it", but it also teaches her that when you approach when she's eating or has a bone, you have something better. Doing it the "old fashioned way" and just taking the items away at random doesn't teach anything other than "Mom sometimes takes away my stuff, I'd better guard it harder." Don't worry though, it's a common training mistake.
If you want a playmate for Bella, please consider adoption. There are literally dozens of wolf hybrids that are put to sleep each year in Ohio. Working with the rescue, I have the heartbreaking job of trying to find qualified homes for so many of these animals. They are not as rare as you would think - the fact is, irresponsible breeding has put their numbers at an all-time high, and so many end up in rescue when their owners realize that they are more than they bargained for.
Just since the beginning of 2009, there have been 10 wolf hybrids in urgent need of rescue in this state. It seems to be getting worse every year.
I'm in NE Ohio too - a lot further north than you, though - north of Mansfield and Akron.