We used to feed our cats almost entirely dry food, with wet food as an occasional treat (no real schedule for wet, just every now and then).

But over the years we’ve had a number of cats that had health issues that were mitigated by switching to mostly wet food.

So now it’s reversed- almost entirely wet food with dry food occasionally (every couple of days or so). At least, for our indoor cats.

We also take care of a feral colony (many of which we’ve TNR’d), and those cats get dry food for logistical and cost reasons.

I don’t have an alternative program to suggest, but there are some workarounds for using redshift.

First, in the config file, you can set the location provider to manual, then specify a lat/lon and it will use that location in its time calculations. I do this on my laptop, and it works well except for when I cross multiple timezones - things are obviously off a bit.

Second, with the caveat that I haven’t tried this, it looks like you can also manually set dawn/dusk times in the config, which sounds like what you’re after.

See man 1 redshift for more info.