Howdy neighbor! My
cavies came with the colorful mix pellet food also. I was in the same situation with the waiting on shipping. I opted to comb through the food to save only the pellet bits. The seeds, nuts, bolts, pinwheels, X and O bits and the like went to the compost pile.
When the new pellets arrived I mixed 75% old, 25% new for a couple day, then 50/50 and so on. I use a measure to "dose" out the pellets each morning, no more, no less.
With the vegies they get the green pepper and green leafy bits every meal but I try to mix up the other vegies to avoid meal time boredom. I did print out the pdf food chart but B & P can't read and don't care which ones should only be once or twice a week. They fling the leafy bits and dive into the treasure on the bottom.
I try the new stuff several times, they ate okra, turnip greens, turnip root slivers, asparagus the first time then not the next. They would have to be picky about stuff I still have growing in the garden (read "free"). I just offer and what ever is left at the next meal I clean up and put in the compost pile.
B&P seem to enjoy twinkling under the hay rack. Okay by me, easy to clean but a bit wasteful on the hay. I took to loading empty family size tissue boxes (Kleenex) with the timothy and placed the box near hay rack land. This seems to work for us, they don't drag as much hay out at one time but still twinkle under the rack, the bazillion doots a day still go every where.
I was going to make a snarkie comment about a certain brand of pellet but you may live in Katy and I wouldn't want to offend.