Boy do I have a problem with this one too. Sheena is almost 50 lbs and should only be about 30. This morning I found her chowing on Shadows food (Shadow eats only one kind of food). For rooms that the dogs don't need access to you can take a piece of plexiglass and have it cut 1/4 inch wider than the door frame. Depending on how big/small your dog is would depend on how high you want it. For Sheena I can go with a 16 inch height. Leave enough room below the plexiglass for the ferrets to come and go easily and wedge the plexiglass in the door frame. Make sure it isn't placed too high that the dog can go under. My condolences to all that have lost their beloved fuzzies. Hugs. tle [Posted in FML issue 2419]