Paul, Are there any downsides to using an all in one supplement?
In my mind I see it as a balanced meal, compared to having to alternate between the two supplements. For example to describe what I mean with imagery say, drinking milk one day and eating a bunch of carrots for the next and alternating every day rather than just eating a balanced meal everyday.
I would imagine the only real answer to this is the actual amount of nutrition that the supplements provide at time of feeding. Like you said, ODing on Vitamin A can be dangerous, but would it even be possible at all using an all in one supplement?
I haven't gotten into the habit of properly supplementing every meal for my pacmans but I have nailed down their eating habits and schedules.