i had this problem with my 8 yr old cat patch. she would eat so quick then be sick after 80% of the time. when i prepare their food now, i mash up patches food with a folk, so that it is almost like a patte, or like mashed potato (time consuming to say the least!) but now she is never sick, as the food just goes down like a smoothie almost. i dont know if this will work for you but it really helped for my patch.