Most of the modern industria inspection imagers I"m familiar with use uncooled microbolometers, instead of the older-style Stirling-cycle coolers, or, worse yet, the liquid nitrogen devices. The cooled detectors still have their place, though.
Detector resolution is key for spotting and identifying things at distance. The Ti9 uses 160x120 - not even cheap webcam quality images, but it might let you know something is out there. In this case, more is better.
The device I use most for work (inspecting live electrical switchgear, mostly) is a FLIR P640, a longwave imager with a 640X480 display. I haven't priced a replacement lately, but I'd expect around $35K. It's a little smaller than an old VHS camcorder. Not the best rig for hunting, but it will let me find all sorts of interesting things in the light or the dark.
Note that an animal's signature is sometimes not easy to pick out. As someone mentioned, the background, ambient, and reflected temperatures can confuse the issue. Long hair tends to stay cool, closer to air temperature. Open mouths, nostrils, and eyes are usually warm, but don't expect it to look like a photograph of the whole animal. You'll likely have to frequently change the temperature level and range as you scan.
No, I don't think my boss would like me taking the P640 on a hog hunt - unless a paying customer was involved.
Here's my dog at a couple of yards, after a few minutes out on a cold night. Notice her paw prints still visible in the grass.
