our 20 year old cat is making this sound intermittently. his appetite has gone down. vet is unsure of what is can be and put him in antibiotics to see if that will help before further testing. bloodwork and X-rays. just curious what others think it may be. his only other medical condition is mega colon, where he needed an enema three weeks ago and has been gassy and pooping pretty much enough. the doctor did not feel another blockage when we brought him in. drinking hydracare and not dehydrated. thank you!