I'm not sure weather my piggy is in pain, whenever I stroke her back she purrs but also let's out little squeeks and licks me, she's about 5 now and I wonder if its arthritis in her back legs or just squeaking in happyness? There just quiet short squeaks but other then that she's a lively piggy that eats alright and everything. Although she has a history of pus filled lumps, such as one behind her ear that burst when she was about 3 and a large one under her chin that (painfully but thankfully) burst when she was 4