The sounds I use on my FoxPro Fury that have been the most productive for me in early season are the DSG rabbit, dying jack and pup in distress. Mid season female long howls, pup howls, grey fox distress and bird distress calls are effective. Later into breeding season I more or less stick to female invitation howls, long howls, female estrous whimpers and occasionally a territorial challenge howl. Mating and curiosity calls are the most effective this time of year. Leave the old rabbit in distress call that worked early season in the truck if you want to be more successful.