Interceptor
It can take a deer down with good aim....

ewok12346
yep,practice on aiming if you want to save every hen

archerdude
Yes, a 30-35 lb draw-weight recurve is a good choice to learn archery with. Just make sure you get some properly made arrows, made for the bow AND your particular "style". Use the wrong arrows (not matched to the bow and you) and the bow becomes just another "stick" with a string attached because the arrow does all the real work...the bow is just the means of delivering the arrow. Ask about that here: You can find the basics of proper archery technique ("form") here: I answered your question about using a bow to mkill foxes in your other question. Practice a LOT, and gain some skill. Be accurate, using a properly made made arrow, and you can use a 30 lb draw-weight bow to kill a deer at close range (within 20 yards) -- but whether that's legal or not depends on where you happen to be at the time.

targetbutt
People seem to concentrate on aiming too much. At the beginning, aiming should be the last thing you need to worry about. Take the fiberglass bow, and lash on a toothpick with some tape or rubberband. This will serve as a "sight". Now go up close to the bale or targetbutt. I suggest to not use any target at all when you just started. And just practice your form. All the aiming in the world won't help you shoot a recurve/longbow well if you have bad form. The key is getting consistent. Consistency starts from how you put your fingers on the string, raise the bow the same way all the time, draw and anchor the nock to the same place on your face all the time, and finally the release. I'm not sure how big and strong you are, if you have a friend around it'll help a lot. A few signs you need to watch out for that will tell you if you're not in control of the bow, arms shaking, you lean back as you draw the bow, your face changes expression as you draw the bow, or your head moving back along with your draw hand. Have a friend watch you as you shoot and watch for these signs. If you're showing these signs, you need to go lighter on the bow. As archerdude said, get a good set of arrows. With those weights, assuming you pull 28", you'll need aluminum arrows that are around 1716.