when you say you try to include a little of everything, do you do this in each feeding... a little of everything all at once?
try breaking it down a little... so many options could be offering a bounty of goodies & at that point they will pick & choose what they like best rather than eat everything that is good for them
kind of like putting out a bowl of spinach along with ice cream, cookies & a chocolate bar out in front of a 3 year old... you know that kid will fill up on everything else long before he reaches the spinach
offer the most important items first... such as the lab blocks & then a small amount of the grains/pastas
move the cheerios over to the treat side of things because my guess is that there is most likely a lot more sugar in that than you think.... check the carbs & sugar carbs listing. Finger feed this item to them a few at a time once a day
Seeds are high in fat & should be moved over to the treat side of things as well & those too should only be offered in moderation every other day or so, depending on how active your rats are.
Dried fruits & veggies... the thing with dehydrated fruits is that they shrink to a dramatically small size once the water is removed but their sugar content is not changed... that teeny-tiny piece of fruit packs a punch of a sugar rush & your rats will gobble it up gladly... high energy but not filling, this will cause them to take in too many nutrients on one side of the scale & not enough that other foods offer.
You could do away with cream cheese & yogurt drops all together because they don't provide anything your rats needs for nutritional balance. With all the sugar they are already getting & all the fat they are getting from seeds it is just way too much going in.
try to work in more veggies in as raw a form as you can... or even the frozen mixed veggies (corn, carrots & peas)... the grains & musili are good to offer daily but try to get them to focus on their block first... grains second & then onto fresher fruits & veggies.... everything else can be offered periodically (not so much daily) & offered as a treat.
just a suggestion because without being able to actually read the labels or know exactly what seeds & such you are offering.. my best guess is that their diet is too high in fat & sugar.
