Dragon Shaking,...

[maverickgtr]

The breeder I got my beardie from kept all his beardies on sand with no problems. But they were born on sand so they were used to it. Some beardies like to lick things to get used to them. Isis is a poster child of this. When she first encountered carpet she licked it and I had to run over to make sure she didn't get any stray fibers in her mouth. Sometimes they're just going for a cricket and they get sand too. If they get too much sand, it can cause impaction which if not noticed or addressed, can be deadly for dragons. Paper towels, tiles, laminate flooring, etc. It's incredibly easy to clean and spot poos or if anything is abnormal about the poo. And it's a one time investment. If you're keeping the little guy, coming from someone that's switched from sand to tile, it's a worthwhile investment.

If all you've got is one tank, can you maybe get/make a divider or something until your friend can get the female again? It'll be easier to see if he's not pooing or not eating if they're separated. And I'm not sure who it was here, but I read about one guy's/girl's bigger beardie dragging a smaller one around by it's head. So like BPEliz said, you can't know what she's doing to him when you're not looking. I understand having an animal thrust on you, so just try to get that spare tank as soon as you can.

Is it kind of like an up and down shake? Beardies will bob their heads sometimes. But this sounds like a dog shaking when they're cold type of thing... I've never heard of an actual shake... It could be stress, new environment with another beardie, it's cold out, etc.

Oh and the not pooing, it could be impaction, it could just be because he hasn't eaten. If you hold him on your hand across your fingers, just gently "wave" your fingers across his belly. Massage his belly basically. I did this to Isis once when she had pooed in a while and almost immediately she pooed, so make sure he's over like a paper towel, or the bath tub or a toilet. If he is impacted, you should feel bumps kinda like pebbles in his stomach.