I have several pets and am quite often able to buy them heavily discounted premium food in taped-up (broken) bags and boxes and bent cans (at the Navy Commissary and other stores, such as Vons and Ralphs and occasionally, Albertsons).
Yes, Tide is very expensive and always was but there are much cheaper alternatives out there (with avail $1.50 to $3.00 coupons in the newspaper and pennysaver).
So, there ARE ways to (economically) feed a pet and wash clothes for the persistent shopper :=]