I recently purchased some of the pet ecology perfect litter (same concept as first alert) to see if either of my cats had a UTI. One of my cats used the new litter last night & a few spots turned color. The clumped “urine cake” is about 3″x4″ and is normal in color except for two spots on the bottom. It is obvious that whoever peed scraped down to the bottom of the litter pan & peed directly on the pan, then covered it. This makes me wonder if the color change is due to the “alerting” litter coming into contact with the old clay based litter. Is the entire clump supposed to change colors or only a few spots in the clump? (BTW, yes I did clean the litter box before adding the new litter but it was not a perfect job – I have 6 month old twins & a 2 year old!!!)
More info – the 2 spots on the bottom of the clump are both about the size of a nickel.
Also, neither of my cats paces, cries, urinates frequently or acts like they are in pain. My male cat is 12 years old & my female is about 7-9 years old (??? – she is a shelter cat). Thanks for any advice!