I really can't thank everyone enough for all the help I have had on this.
I am fairly new to FMQ but have FMQ a couple of quilts using my basic Pfaff so just couldn't understand where I was going wrong but last night I had just about had enough.
Then on the advice of Annaquilts I put the dog feeds up and it is now totally fine....every time...I cannot believe it...and am so delighted.
This board is such a wonderful support ....you have all certainly saved my sanity this week ! Thank you again