Do Savannahs develop a winter coat? Rafiki will be 2 in February. She kept her sleek coat all winter last year. This year, she looks much more shaggy, especially the ridge along her back. She does now have access to the catio that she did not have last winter and it has been dropping down into the low 40's in the early hours of the morning. Could that cause a change in fur? It only became noticeable a couple of weeks ago.