I wouldnt give senior food to adult cats, unless they are overweight, as it does have certain thigns reduced due to seniors being less active (Tell Molly that at 12am!!). Personally, mine aren't on senior food at the moment, if they have purely senior dry, they loose too much weight, so they have a mix of it. If you want to try Senior PAH, pm me your address and I shall happily send you some, as I have 4kg here that they dont want!! I used to feed Senior wet, but then went on higher meat content foods, and only one of those come in senior, so mine (15 and I feed Zi who is 17) get adult wet.