Yes, feral druids can do fine in raids, although I wouldn't waste energy on Cower unless you're sitting at 100 energy waiting for the tank to build threat. Really, after the first 10-20 seconds of a boss fight, the tank should have enough aggro that you can go all-out anyway. If not, he's either way undergeared or just bad at tanking.
General Cat DPS tips:
1) Unless it's necessary for the boss fight, always stand behind the boss. Shred should be the biggest % of your damage. Also, mobs can't parry or block attacks from behind.
2) Mangle. Keep this debuff on the mob at all times. It increases damage from Shred (and Rip if the mob bleeds) by 30%.
3) Ferocious Bite is a no-no unless you are sitting at exactly 35 energy, the mob is immune to bleeds, and you're not about to get an energy tick. Other abilities to avoid: Tiger's Fury, Rake, Claw.
4) Stats. 142 hit rating means you won't miss. After that, Agi > Str > AP > Crit. At any reasonable value for total AP and crit %, Agi is always better than Str. 1 Str is better than 2 AP because Str is increased by BoK, AP isn't.
5) Power-shifting. With 5/5 Furor, you can make a macro to cancel catform and recast it, putting you at 40 energy amost instantly. Timing is important because you don't want to shift while your GCD is up or when you have more than 20 energy.