I mean my Liometopum occidentalis has readily excepted raw hummingbird nectar, even though they don’t need it as much, but the piled dirt on sunburst. Actually my fragilis have still not drank from sunburst. I tried a feeder and wax paper.
It sounds like your ants are well fed. They aren't going to drink if they're not hungry, or after recently filling up on another sugary food. Ants put dirt on moist foods after they've finished eating, so only give your ants as much as they can consume within a couple hours.
There are a lot of factors that can affect feeding activity, such as low ambient temperature, small number of brood/workers, not enough time since last feeding, etc.
If any ants accept honey or homemade sugar water solutions more vigorously than Sunburst, that would be something I'd be interested in hearing about, because it would be highly unexpected.
To clarify, what I meant by this would have been a side-by-side comparison between two sugary liquids at the same time, and by a colony with a sufficient number of workers so as to definitively conclude that one sugary liquid was prefered over another.
If ants are fed a sugary liquid, and then offered Sunburst some time later, it would be reasonable and expected for them to reject the Sunburst if they are completely filled up on the other sugary liquid fed earlier.
In conclusion, Sunburst is >= sugar water; it is not a miracle appetite stimulant that causes ants to feed even after they are already full of food. And small colonies don't feed all that often, so there's no reason to be just because they aren't feeding as frequently as you'd like.
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Edited by drtrmiller, February 11 2019 - 2:58 PM.