I am using Lardy TRT. I have an 8 month old BLF. Both remote sit force and side send force went very well, excellent response. Started whistle stopping her on return no problem. Started whistle stopping her out to the pile with a side send, no problem. However, next side send she popped. I NO'd her and re-heeled her and sent her again and she did fine no popping. Next side send she popped again so I forced her back. It took multiple nicks to get her to go back. She was very stressed. So next I simplified and sent her from a remote sit back to the pile, no problem but stressed, I quit for the day. Next day just did just remote sit and side send back to the pile with no force, excellent response. I am thinking spend more time just on simple pile work with no whistle stops. When I start whistle stopping again should I force her back if I get a pop or NO her re-heel and re-send???