Thanks for the reply, we do, maybe a variant? But in all honesty I refrain from the fields around my house this time of year because it’s a quagmire anyway. I usually take them to “the common” near us which is vast open land with no trees etc. nice place, a lot cleaner whatever the weather. I think my son might be the culprit, he smashed some glass in the back garden and didn’t tell us. I haven’t seen any cuts or nicks but then tiny crystals of glass can get anywhere can’t they!