Catbrat, it could take a few weeks to a month, don't give up. You probably feel like you are taking 2 steps forward, then 3 three back, then 1 forward, etc. Remember, it's a living animal, not a machine. Patience is the key. You may find that after a month you cat just doesn't do Wellness, then you move to a different brand.
If we though that on food was good for all pets, then we would only carry one food, but we don't. We carry many, for this reason.
Best of luck.
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paul
Axiom M80, VP180, Qs8, EP500
Panasonic PT-AU900
AudioTrak AT-6100
Denon AVR-990