for me whenever my RTC or RTC x TSN swallows something its not suppose to...i just do a large water change and pouring the water or spraying the water aggressively and with all the water agitation happening seems to make my cats puke what ever it just ate a few minutes ago...and while im still syphoning the tank I take out the puked out food and then pour the water or spray the water in slowly and try to not make anymore harsh agitation on the water....then I let the water settle in and wait about a couple of hours to a day then continue with the regular feeding...