I find myself browsing the trading center and I'll find a lioness I would really like for breeding and she'll be frozen. So I suggest that an option for showing frozen lions should be added like we can for lioness in heat but if you select it, no frozen lions will shown in the results. This will prevent people from having to mill through frozen lions when they really arent interested in them and will just make it easier to find the lions you would like. Or possibly could be an option to show only frozen lions as well for those looking for frozen lions.