I have 3 cats and I am going on vacations from September 5 returning on Sept 11 around 8pm. One of my cats needs a Potassium supplement twice a day (Morning and evening) and I need help with that. Also I need the cat litter to be clean once a day. Cats are indoors, very friendly and they never fight or scratch anyone. 2 old and 1 kitten (the kitten is the one that needs the supplement. They have an automatic food feeder so food is not necessary, just verify that they have water too.