Purina one urinary formula change?

[Brom’s Mom]

My cats used to LOVE the stuff but now they hate it? Not just one bag but all of the big bags they hate. I bought a little bag and it seemed to be the old stuff because they ate it up.
I keep buying big bags but they refuse to until they’re really hungry. So they harass me all day long

 

[LTS3]

Are the big bags from the same lot / batch number? Is the small bag from the same lot / batch number or a different one? Sometimes different batches are slightly different even though they have the same ingredients and a cat can detect something "yucky" about it.

 

[FeebysOwner]

Not only lot/batch but compare the ingredients between the two bags just to see if you can pick up on any differences.