Go to Mat
I've worked on this off an on over the years but it is not perfected. TodayI decided to take it outside in my backyard. Works great on the deck, but the minute I put it on the grass she is busy sniffing around and eventually goes to the mat after looking and sniffing around. She goes to the mat but is really slow and not with the speed on the deck. I did use higher value treats for the grass work.
I do this a few times and move on to something else before i get too frustrated, ending on a success.
If I told her to kennel up she would do so, with speed, even if she was chacing a squirrel.