[CeriJohn]

Are there any recccomended timber treatments for DIY hen-arks? Given the time and love that has been devoted to the project, I'd like it to last as long as possible!!

[Casey76]

Anything which is bat friendly will be chicken friendly too

[Jacinta]

I used fence life by wilkinsons, it's their own brand, has double wax content and is friendly to plants and amimals.  It only cost £8 a large tin and it goes on beautifully, gives the same protection of cuprinol and the other expensive brands.