Totally agree with Marcia - even here in FL where our winter hits maybe 60 degrees Fareignheit for about five minutes - our Leos (especially females) begin to slow down a good amount. It freaked us out our first season but after some good research and the use of GF.net and the wonderful Search function! we were put at ease.
Since then we've done our best to bulk everyone during the spring, summer, and fall months.
This year we did well - our leos are larger than they've ever been, and just in time for when they are beginning to mate or somewhat bruminate.