I don't know what you have against Purina but they make feed for lots of other companies. The feeds they make for other companies are made to the specifications those companies have designated.It's not a one-page site. At least it isn't now. It doesn't have a full menu, just the hamburger menu like you see on mobile sites. That being said, I can't find the manufacturer. Do you know who makes it? I'm trying to get away from Purina.
Purina makes both good and poor quality feeds. The price of the feed is a partial indication of the quality you can expect with cheaper feed being poorer quality.