Concrete eye bolts into the ground, use stranded cable and a concealed hasp lock, bolt cutters won't cut through that, they'd need a torch.
use stainless...
you cant cant cut stainless steal with a torch.. (Well you can kina melt it away with great difficulty..)
so now they'de need a plasma cutter.. so portable air, and prolly 240 volts..
for like 20$ you can get motion activated alarms.. they can be easily mounted outta site, etc...
secure it with the cables near the dogs pen, put bells on it too even..
noise of them messing with it, seting off alarm etc should get teh dogs riled up even if you dont hear it, and if nothing else scare em off..
along with motion sensor lights.. those things do wonders..
as for the recording, i bet you alread have the camera set up a tthe nieghbours daughters.. haha.. jk jk jk
Back in the day when i lived with roomies, i had 175 yami bike..
id go to work and come back, bike would be outta gas, plastic cracked etc etc..
I t used to be an enduro type and had all the lights etc wich i removed and used as a dirt bike after puttinon a knobby..
i found this realy fine wire, wove it into the seat (Which I had stapled an old shirt over years before since the vinyle was shot)
I ran a wire to one side of a signal switch from the spark plug, and then to the wire in the seat...
you didnt want it running with the left turn blinker on.. lmao..
came home one day and found out real quick who dropped it real suddenly..
as for safety and boobie traps etc, well it was an old bike.. only a matter of time till something shorts out.. haha
All my machines are stuffed into the garage, but it doesnt lock, we have 2 motion sensor lights, and with the fence its hard to get out of our yard quick..
the other machine is in the box of my truck now since i dug it outta the snow bank.. back truck up to eagle (Parked in driveway) and its pretty much impossible to take.. not even enough room to lift it out unless they rolled it over the roof since the house is close on one side, and the nieghbours fence on the other..
anyway, good luck!!
and do a search for locking/security cables.. theres some pretty good stuff out there for good prices.