grantbear,
The bats are best neutralized using a ranged weapon,
when they are incoming from above. A bow, throw rocks, sling shot & pebbles, or my favorite...the blow gun&darts. Once you do this once or twice you will see they are actually easy to kill. But not with a weapon in hand melee style is a bit harder. They have a very small damage rate too.
The deer are programed to flee from the player once they detect your presents. (as in real life) You have a limited time to shoot one before they begin fleeing... and it would be a miracle if you kill more then 1 in any event.
There are a few other items you will learn over time that can satisfy certain "cravings"...such as whitemeats can be satisfied eating eggs too. Maybe I can add a list in the diary of food types and the cravings they satisfy...but it would be a huge list and take up alot of room...so idk yet. Clicking any item in your rucksack will show too, what craving that item satisfies, if any...here is a partial list on
page 62 mid-way down the page of craving types and what foods satisfy them.
Note: sometimes a craving can last days due to not having the proper items to satisfy them...this is intentional, for several reasons, but mainly to encourage the player to plan ahead for cravings, and seek alternate food items to keep a healthy diet. As a craving not being satisfied makes other foods 50% less filling...you can still survive, it obviously is just harder until you solve the issue.