I've never found a accurate gage for the propane tanks. I have a magnetic stick on one that you pour hot water over and it changes color at the level of the propane. You do 2 propane tanks so open one at a time. When the first one goes empty you just open the second and then you get the first one refilled.
I like how the dogs ears flip over backward. I had a dog like that once and it was funny. You could use a clothes line clip and clip the dogs ears together on the top of his head and laugh. (Of course the dog didn't like it and would set there and give you a dirty look until you took it back off. )