If rabbit food and nutrition is anything similar to dog food and nutrition(and I'm not talking along the lines of similarities in their needs - let's face it, an herbivore =/= a carnivore, I mean along the lines of brands and quality and nutritional value, etc), then Walmart food(particularly Walmart brand and other cheap, lower brand foods) is not nearly so nutritional as those high quality brands that have ONLY what is required for nutritional value, and not all these additives, preservatives and other 'fillers' just to fill the animal up rather than meet their nutritional needs.
I find the higher quality, or the closest to their natural diet that I feed, the longer my animals lived/live and the better their health, leading to less veterinary costs to boot.
For example, Beneful dog food causes my epileptic dog to have grand mal seizures monthly, if not weekly, but if he's on Acana or raw, he has MAYBE one in a year, two at most - and that's just from preservatives(BHA and BHT being the big ones) and fillers that don't do anything nutritionally of value to his system.
Take a rabbit, put it on the cheapest, lowest quality food possible that's made up of corn, sunflower seeds, and other small grains and junk that's more used as a filler than as actual nutritional valued ingredients, and you're more likely to have a shorter lifespan and larger vet bills.
Just my opinion after much research into finding what's best for my pets.
That said, I'm not saying your pet is going to drop dead because you feed cheaper food, by any means. Nor am I bashing anyone else's food choices for their pets. This was my choice, for my pets, after I did research for several years and found what was absolutely best for their health.
I do think that if there's larva in the food, I likely wouldn't feed it to my pet. Nor would I freeze it only to have problems later. New brand sounds like the best option.
Just my opinion.
