My old 15 year old female cat had a quite prominent "udder sack". Might've been because she used to be pretty chubby and lost a lot of weight while battling cancer and loose skin just hung down. But then I noticed Shami who's only 5 mo. old and a male started to develop one too. Just seems like a small soft squishy sack that hangs down right in front of and between the hind legs. This normal thing for cats to have?