There may be less expensive alternatives, but what to look for in ingredients is meat. You want a food that has no grains - it's definitely best to avoid corn, and wheat or wheat gluten can be a problem for kitties over time. If you have the name of the food, we can take a look at it for you. I do hope your husband can understand the concept that cats are obligate carnivores. Their bodies are designed to get all their nutrition from animals. They are just not "set up" to derive their needed nutrition from plants, and this places stress on their systems over time. Saving money on food now may result in large vet bills when they're older. I'm sure you know the saying, don't be penny wise and pound foolish. :heart2:
If you do decide to switch dry foods, it is best to switch them slowly. Add less than 1/4 of the total amount of food you put out as the new food, and keep it that way for a few days to make sure it doesn't upset tummies with vomiting or diarrhea. Then increase it to 50%, and keep it that way for a few days, etc. It should take at least a week to make a full switch to the new food; the slower the better.
If you do decide to switch dry foods, it is best to switch them slowly. Add less than 1/4 of the total amount of food you put out as the new food, and keep it that way for a few days to make sure it doesn't upset tummies with vomiting or diarrhea. Then increase it to 50%, and keep it that way for a few days, etc. It should take at least a week to make a full switch to the new food; the slower the better.