I'd just like to point out that the FAQ ruled that animal companion is not advanced by bloodlines. Check out the thread on this board "Check out WotC's newest BS" and Ctrl+F Bloodlines.
Now, what you need to do is go Druid/Prestige Ranger/Fey Bard, that'll net you 3 animal companions, but they'll be super weak. So pick something useful, like a hawk, an owl, and get a wolf just 'cuz. Then with beastmaster, you should be able to pump up one of your animal companions, and I'm AFB from Beast Heart Adept, but that should help too.
Check out the Iron Chef CO project with the secret ingredient Beastmaster. Someone used Beastmaster with Witchborn Binder to share dissolving spittle with their animals, and they had like 4 animals throwing out dissolving spittle ranged touch attacks. It was a pretty cool build.