Mine do it over the side of the pub table, on top of the refrigerator, in their cat bed, food bowl, kitchen floor, bathroom floor, carpet in every room, handmade quilt, bed, clothes, shoes, where I specifically sit on the loveseat, doorways etc. My large cat gets huge hairballs that cause constipation and puking. He has to get hairball treatment. Bombay is meticulously clean so he gets hairballs every few weeks but sometimes doesn't bother to chew his food which makes him puke. Food is $45 a bag. Angora is 15 and doesn't groom much so only once a month hairball. Big cat gets huge hairball every other week. That hairball remedy saved his life repeatedly. His background was bad so he got accustomed to swallowing hairballs and at age 12 it has caught up.