The feat works fine here, I think. Whether or not it is worth it, well, that depends on your combat style.
natural bond helps quite a bit in lower levels for both melee and archery based rangers (and sorcs, in your case) by sometimes cutting off incoming melee monsters. Rangers pets are never really very strong fighters because rangers just dont have the buffs for them like druids do. you might be able to use your sorc buffs like improved mage armor or stoneskin to really help it alot. So, your pet might die alot, but it will also help you stay alive a little bit longer in some cases.
As you progress in levels your pet becomes less and less useful. So those who consider taking natural bond should take it early.
If you are going to stick to just 4 ranger levels in your build and focus on EK or sorc. your pet will hardly ever be useful except in some RP circumstances, where it can at least help you have some RP fun. It will be just an extra familiar for you, without a familiars abilities. but bigger
Animal Companions do tend to be useful if you are evilish and want to use them to set off traps. You summon it, and command it to open lock, and will happily sacrifice itself, bash the lock, and die.