Dogs and Wood

[BeagleMum]

My dogs (beagles) both have a strange obsession for wood. They both love to eat sticks, rocks, mud, grass, whatever. They have already eaten one of my chairs that I had in the back yard and my lilac tree. They ate the corner off of the shed and then chewed part of the base. They have a ton of chew toys and play toys but are much more interested in eating my things.

We just got a pool about a month ago and put in the deck this weekend. Not 2 hours after the deck was done did Sydney eat the corner of it. Now, every time they go outside, they head for the corner to chew on it.

Last night I put some Vietnamese hot sauce on it and it seems to be keeping Spencer away but Sydney likes the stuff and jest goes over and licks it off. This stuff is so hot that I can barely stand it.

Any suggestions on what to do to save my deck before they eat the whole thing?