update: I bought a spray can of "Touch 'n Seal" Polyurethane foam sealant, quick cure, seals and insulates...cured foam wears off and if not harmful to health... so my plan is to use the straw to apply a bead of this around the two windows, into the cracks between the walls and the walls and floor, from the indide and maybe also along the cracks from the outside - and I'll let it cure and paint over it and hopefully the chickens won't even notice it because it will be painted. After I bought this I saw a cheaper option - a Liquid Nails type caulk that would have strengthened and sealed the coop. original post: Is there a product I could use on the edges of my coop (internal or external that would "seal" up the cracks where wood doesn't meet wood at sides and edges? Like caulk but weather, temp and chicken-proof? If there was something that would dry hard and 'un-chicken-peckable" I would use it inside the coop around the windows and all the cracks. If its poisonous, I'll use it on the outside and just hope the paint will cover it up from the outside.