Bad Deer!

Animal Control in our suburb refers to stray cats as either Feral (wild and unapproachable), or Community Cats (tame, and generally fed by various neighbors). In reality, a Community Cat will hang around whoever feeds them the most, and that being me, we decided 6 months ago to take a particular very gentle friendly female to the city animal shelter to get her spayed. There was no charge. However, ever since then, she's exhibited odd behavior. It seems she has a much more frequent urge to poop than is normal (I've owned cats and dogs most of my life) and the efforts are rarely successful. She never attempts to cover it up, as there's nothing to cover. Then she always drags her bottom thru the grass. She eats normally, and is of normal weight, and this has been going on for 6 months. The daily routine is when I drive home each evening, she emerges from the hedges and immediately attempts to poop, holds position for quite some time, then drags her butt, then comes to greet me. I might go out later after dinner, and there she comes, from under the parked car, to once again, try to poop. My theory, is that the city botched the operation, and somehow it has left her with this constant urge. She obviously is successful at some point during the day, as she's normal weight and never in distress. Ideas?

So, thinking of getting a custom built enclosure for my soon to be red tegu.. and it needs to be a minimum of 8x4x4. So I am trying to think of ways to get it built in a way that I can assemble and disassemble without anyones assistance. I am unfortunately disabled, as well as a bit weak. I wanted something easy to assemble and disassemble because I plan on moving in 2 years time and don't want to wreck an enclosure, as I find it wasteful. I want to be able to make it more than structurally sound, so that you can mount lights inside (a lot of them- which are heavy).... and I want to make it a bit water proof because the tegu needs high humidity and well you can see where that goes..... Was thinking of a 3/4th inch pvc being used. Or some kind of frame that I could just slide in and out. Currently it's going to be in a 4x2x2 zen habitat (which I found out time after time that the quality is rather shoddy- despite major reptile keepers sponsoring them)..... but it needs to be moved in 2-3 months time. Any ideas welcome.