And what‘s their benefits compared to the non- genetically modified
Place the stands carefully and as long as they are rated to hold that much weight, don't worry.
Yes, but I don't think it's necessary for 3-4 month layover. Your tires are not going to get flat spots in that length of time.
There aren't such things.
Feed additives are typically things like mineral supplements, medication, or non-organic substances that either help bind the feed or help digestion (grit with chicken). Those types of substances are not based on organisms so they can't be genetically modified, nor is there any reason. It might help to specify your question a bit more if there is a particular animal feeding system you are interested in.
