This is what I'm trying to say. Sorry if my words didn't suggest this at all.
I just find that it takes too long having to select a drop-down of options, then toggle what I want to be toggled, when I really only care about like 3 things lol. This is where heavy customization comes into play. I personally only care about my snake shedding, when it's in shed, when it ate, and how much it weighs when I weigh it. I know a lot of people like to keep detailed records on each of their snakes (defecation, size of prey, length, etc.).. I think you should include all of those options, and allow the user to customize their own feed chart. Once they complete a month (or 2 months, etc) of feed tracking, they should be able to print out hard copies of the records.
You can never go wrong with customization. Deep and meaningful customization is a must IMO. Allow the user to customize the wallpaper, the look of feedchart, or even the font! I think any of these things would make for a sweet app that anyone can use.