35lbs is enough to legally hunt anything in the US.
45 is enough to legally hunt anything in Canada (like maple syrup trees).
40 is totally a good enough weight to start off on.
Bows in that range are amazing for accurate shots on the range and legal for hunting most critters, but I'd hate to try and down a deer (not to mention moose or bear) with a bow like that. The most unsavory part of bow hunting is putting down the thing you shot after you catch up to it. Smaller stuff isn't too harrowing, but I wouldn't want to hunt large game (as a leisure activity, not strict survival shit) with a bow unless it had crazy draw strength. Even with some really deep wounds, you'd have to track your target for a long-ass time then put it out of its misery by severing some arteries/veins in the neck.
On the topic of hunting/survival type stuff, have any of you tried spear or bow fishing? Check your local laws, as this can be more restricted than gun use depending on area. It's really easy to whittle a two or three pronged spear from a piece of wood (no need to make stone/metal heads and attach them), and catching bullhead/carp/catfish is quite easy if you toss some worms or frog parts into the right bit of shoreline.
I love me some clean tasting bullhead caught from a pristine little lake up in the boonies. Just like ocean fish take on the briny/seaweed taste of their ecosystem, freshwater bottom feeders can be really tasty from the right source.
If you live anywhere with unpolluted waters that have invasive asian carp species, eat the shit out of them. Cook 'em up like a catfish, or steam them whole with ginger/garlic/scallions. In addition to a tasty and practically free meal, you will be doing your local ecosystem a huge favor.
Fuckin' carp.