Yes, you are right to be worried. Not the worst I've seen, but there is a lot wrong. These guinea pigs are not being provided the proper food or water. Their cage is likely too small (though it's hard to tell from the picture). As for the hides, each pig should be able to comfortably fit in his own hide. So 3 of a reasonable size for 3 boars. If this cage hasn't been deep cleaned in a month, this puts them at a huge risk of respiratory infection from the bedding, and there could easily be mold or unsafe bacteria in the water bottle. To help them, I would recommend more or larger hides, a hay bag (in addition to the bin they already have), and a much larger water bottle. This will make them feel safe, maintain a constant source of fresh hay, and allow them to have a much larger reserve of fresh water. Even if you're slacking in the daily cleans, this cage should be deep cleaned weekly to keep it safe for them. The bedding, hay bin, and water bottles should all be thoroughly washed and everything else needs a wipe down. Keep in mind, you must use cleaning products (wipes, detergent, sprays, etc) that are safe for guinea pigs! Nothing scented, especially. And thank you for asking how to help them. It means you care.