Well Penny has managed to lose the foot putty. I brought her in today and hosed off her foot so I could see. the putty has gone, however her foot looks good. I trotted her up the lane and she seemed to be sound. Penny was very stressed about coming in, now that she has been back out with her best mate Lily. I have decided to leave her foot and monitor it. She is much happier out and seems sound, so hopefully it will stay like that. It would be nice if the weather dried up a bit though...